drivers/media/video/bttvp.h - linux - Git at Google

 /*

     bttv - Bt848 frame grabber driver

     bttv's *private* header file  --  nobody other than bttv itself
     should ever include this file.

     (c) 2000-2002 Gerd Knorr <kraxel@bytesex.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.
 */

 #ifndef _BTTVP_H_
 #define _BTTVP_H_

 #include <linux/version.h>
 #define BTTV_VERSION_CODE KERNEL_VERSION(0,9,16)

 #include <linux/types.h>
 #include <linux/wait.h>
 #include <linux/i2c.h>
 #include <linux/i2c-algo-bit.h>
 #include <linux/videodev.h>
 #include <linux/pci.h>
 #include <linux/input.h>
 #include <asm/scatterlist.h>
 #include <asm/io.h>

 #include <linux/device.h>
 #include <media/video-buf.h>
 #include <media/audiochip.h>
 #include <media/tuner.h>
 #include <media/tveeprom.h>
 #include <media/ir-common.h>

 #include "bt848.h"
 #include "bttv.h"
 #include "btcx-risc.h"

 #ifdef __KERNEL__

 #define FORMAT_FLAGS_DITHER       0x01
 #define FORMAT_FLAGS_PACKED       0x02
 #define FORMAT_FLAGS_PLANAR       0x04
 #define FORMAT_FLAGS_RAW          0x08
 #define FORMAT_FLAGS_CrCb         0x10

 #define RISC_SLOT_O_VBI        4
 #define RISC_SLOT_O_FIELD      6
 #define RISC_SLOT_E_VBI       10
 #define RISC_SLOT_E_FIELD     12
 #define RISC_SLOT_LOOP        14

 #define RESOURCE_OVERLAY       1
 #define RESOURCE_VIDEO         2
 #define RESOURCE_VBI           4

 #define RAW_LINES            640
 #define RAW_BPL             1024

 #define UNSET (-1U)

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

 struct bttv_tvnorm {
 	int   v4l2_id;
 	char  *name;
         u32   Fsc;
         u16   swidth, sheight; /* scaled standard width, height */
 	u16   totalwidth;
 	u8    adelay, bdelay, iform;
 	u32   scaledtwidth;
 	u16   hdelayx1, hactivex1;
 	u16   vdelay;
         u8    vbipack;
 	u16   vtotal;
 	int   sram;
 };
 extern const struct bttv_tvnorm bttv_tvnorms[];

 struct bttv_format {
 	char *name;
 	int  palette;         /* video4linux 1      */
 	int  fourcc;          /* video4linux 2      */
 	int  btformat;        /* BT848_COLOR_FMT_*  */
 	int  btswap;          /* BT848_COLOR_CTL_*  */
 	int  depth;           /* bit/pixel          */
 	int  flags;
 	int  hshift,vshift;   /* for planar modes   */
 };

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

 struct bttv_geometry {
 	u8  vtc,crop,comb;
 	u16 width,hscale,hdelay;
 	u16 sheight,vscale,vdelay,vtotal;
 };

 struct bttv_buffer {
 	/* common v4l buffer stuff -- must be first */
 	struct videobuf_buffer     vb;

 	/* bttv specific */
 	const struct bttv_format   *fmt;
 	int                        tvnorm;
 	int                        btformat;
 	int                        btswap;
 	struct bttv_geometry       geo;
 	struct btcx_riscmem        top;
 	struct btcx_riscmem        bottom;
 };

 struct bttv_buffer_set {
 	struct bttv_buffer     *top;       /* top field buffer    */
 	struct bttv_buffer     *bottom;    /* bottom field buffer */
 	unsigned int           top_irq;
 	unsigned int           frame_irq;
 };

 struct bttv_overlay {
 	int                    tvnorm;
 	struct v4l2_rect       w;
 	enum v4l2_field        field;
 	struct v4l2_clip       *clips;
 	int                    nclips;
 	int                    setup_ok;
 };

 struct bttv_fh {
 	struct bttv              *btv;
 	int resources;
 #ifdef VIDIOC_G_PRIORITY
 	enum v4l2_priority       prio;
 #endif
 	enum v4l2_buf_type       type;

 	/* video capture */
 	struct videobuf_queue    cap;
 	const struct bttv_format *fmt;
 	int                      width;
 	int                      height;

 	/* current settings */
 	const struct bttv_format *ovfmt;
 	struct bttv_overlay      ov;

 	/* video overlay */
 	struct videobuf_queue    vbi;
 	int                      lines;
 };

 /* ---------------------------------------------------------- */
 /* bttv-risc.c                                                */

 /* risc code generators - capture */
 int bttv_risc_packed(struct bttv *btv, struct btcx_riscmem *risc,
 		     struct scatterlist *sglist,
 		     unsigned int offset, unsigned int bpl,
 		     unsigned int pitch, unsigned int lines);

 /* control dma register + risc main loop */
 void bttv_set_dma(struct bttv *btv, int override);
 int bttv_risc_init_main(struct bttv *btv);
 int bttv_risc_hook(struct bttv *btv, int slot, struct btcx_riscmem *risc,
 		   int irqflags);

 /* capture buffer handling */
 int bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf);
 int bttv_buffer_activate_video(struct bttv *btv,
 			       struct bttv_buffer_set *set);
 int bttv_buffer_activate_vbi(struct bttv *btv,
 			     struct bttv_buffer *vbi);
 void bttv_dma_free(struct bttv *btv, struct bttv_buffer *buf);

 /* overlay handling */
 int bttv_overlay_risc(struct bttv *btv, struct bttv_overlay *ov,
 		      const struct bttv_format *fmt,
 		      struct bttv_buffer *buf);


 /* ---------------------------------------------------------- */
 /* bttv-vbi.c                                                 */

 void bttv_vbi_try_fmt(struct bttv_fh *fh, struct v4l2_format *f);
 void bttv_vbi_get_fmt(struct bttv_fh *fh, struct v4l2_format *f);
 void bttv_vbi_setlines(struct bttv_fh *fh, struct bttv *btv, int lines);

 extern struct videobuf_queue_ops bttv_vbi_qops;

 /* ---------------------------------------------------------- */
 /* bttv-gpio.c */


 extern struct bus_type bttv_sub_bus_type;
 int bttv_sub_add_device(struct bttv_core *core, char *name);
 int bttv_sub_del_devices(struct bttv_core *core);
 void bttv_gpio_irq(struct bttv_core *core);


 /* ---------------------------------------------------------- */
 /* bttv-driver.c                                              */

 /* insmod options */
 extern unsigned int bttv_verbose;
 extern unsigned int bttv_debug;
 extern unsigned int bttv_gpio;
 extern void bttv_gpio_tracking(struct bttv *btv, char *comment);
 extern int init_bttv_i2c(struct bttv *btv);
 extern int fini_bttv_i2c(struct bttv *btv);

 #define vprintk  if (bttv_verbose) printk
 #define dprintk  if (bttv_debug >= 1) printk
 #define d2printk if (bttv_debug >= 2) printk

 #define BTTV_MAX_FBUF   0x208000
 #define VBIBUF_SIZE     (2048*VBI_MAXLINES*2)
 #define BTTV_TIMEOUT    (HZ/2) /* 0.5 seconds */
 #define BTTV_FREE_IDLE  (HZ)   /* one second */


 struct bttv_pll_info {
 	unsigned int pll_ifreq;    /* PLL input frequency        */
 	unsigned int pll_ofreq;    /* PLL output frequency       */
 	unsigned int pll_crystal;  /* Crystal used for input     */
 	unsigned int pll_current;  /* Currently programmed ofreq */
 };

 /* for gpio-connected remote control */
 struct bttv_input {
 	struct input_dev      dev;
 	struct ir_input_state ir;
 	char                  name[32];
 	char                  phys[32];
 	u32                   mask_keycode;
 	u32                   mask_keydown;
 };

 struct bttv_suspend_state {
 	u32  gpio_enable;
 	u32  gpio_data;
 	int  disabled;
 	int  loop_irq;
 	struct bttv_buffer_set video;
 	struct bttv_buffer     *vbi;
 };

 struct bttv {
 	struct bttv_core c;

 	/* pci device config */
 	unsigned short id;
 	unsigned char revision;
 	unsigned char __iomem *bt848_mmio;   /* pointer to mmio */

 	/* card configuration info */
 	unsigned int cardid;   /* pci subsystem id (bt878 based ones) */
         unsigned int tuner_type;  /* tuner chip type */
         unsigned int pinnacle_id;
 	unsigned int svhs;
 	struct bttv_pll_info pll;
 	int triton1;
 	int gpioirq;
 	int use_i2c_hw;

 	/* old gpio interface */
 	wait_queue_head_t gpioq;
 	int shutdown;
 	void (*audio_hook)(struct bttv *btv, struct video_audio *v, int set);

 	/* new gpio interface */
 	spinlock_t gpio_lock;

 	/* i2c layer */
 	struct i2c_algo_bit_data   i2c_algo;
 	struct i2c_client          i2c_client;
 	int                        i2c_state, i2c_rc;
 	int                        i2c_done;
 	wait_queue_head_t          i2c_queue;

 	/* video4linux (1) */
 	struct video_device *video_dev;
 	struct video_device *radio_dev;
 	struct video_device *vbi_dev;

 	/* infrared remote */
 	int has_remote;
 	struct bttv_input *remote;

 	/* locking */
 	spinlock_t s_lock;
         struct semaphore lock;
 	int resources;
         struct semaphore reslock;
 #ifdef VIDIOC_G_PRIORITY
 	struct v4l2_prio_state prio;
 #endif

 	/* video state */
 	unsigned int input;
 	unsigned int audio;
 	unsigned long freq;
 	int tvnorm,hue,contrast,bright,saturation;
 	struct v4l2_framebuffer fbuf;
 	unsigned int field_count;

 	/* various options */
 	int opt_combfilter;
 	int opt_lumafilter;
 	int opt_automute;
 	int opt_chroma_agc;
 	int opt_adc_crush;
 	int opt_vcr_hack;
 	int opt_whitecrush_upper;
 	int opt_whitecrush_lower;
 	int opt_uv_ratio;
 	int opt_full_luma_range;
 	int opt_coring;

 	/* radio data/state */
 	int has_radio;
 	int radio_user;

 	/* miro/pinnacle + Aimslab VHX
 	   philips matchbox (tea5757 radio tuner) support */
 	int has_matchbox;
 	int mbox_we;
 	int mbox_data;
 	int mbox_clk;
 	int mbox_most;
 	int mbox_mask;

 	/* ISA stuff (Terratec Active Radio Upgrade) */
 	int mbox_ior;
 	int mbox_iow;
 	int mbox_csel;

 	/* risc memory management data
 	   - must aquire s_lock before changing these
 	   - only the irq handler is supported to touch top + bottom + vcurr */
 	struct btcx_riscmem     main;
 	struct bttv_buffer      *screen;    /* overlay             */
 	struct list_head        capture;    /* video capture queue */
 	struct list_head        vcapture;   /* vbi capture queue   */
 	struct bttv_buffer_set  curr;       /* active buffers      */
 	struct bttv_buffer      *cvbi;      /* active vbi buffer   */
 	int                     loop_irq;
 	int                     new_input;

 	unsigned long cap_ctl;
 	unsigned long dma_on;
 	struct timer_list timeout;
 	struct bttv_suspend_state state;

 	/* stats */
 	unsigned int errors;
 	unsigned int framedrop;
 	unsigned int irq_total;
 	unsigned int irq_me;

 	unsigned int users;
 	struct bttv_fh init;
 };

 /* our devices */
 #define BTTV_MAX 16
 extern unsigned int bttv_num;
 extern struct bttv bttvs[BTTV_MAX];

 /* private ioctls */
 #define BTTV_VERSION            _IOR('v' , BASE_VIDIOCPRIVATE+6, int)
 #define BTTV_VBISIZE            _IOR('v' , BASE_VIDIOCPRIVATE+8, int)

 #endif

 #define btwrite(dat,adr)    writel((dat), btv->bt848_mmio+(adr))
 #define btread(adr)         readl(btv->bt848_mmio+(adr))

 #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 /* _BTTVP_H_ */

 /*
  * Local variables:
  * c-basic-offset: 8
  * End:
  */
	/*

	bttv - Bt848 frame grabber driver

	bttv's private header file -- nobody other than bttv itself
	should ever include this file.

	(c) 2000-2002 Gerd Knorr <kraxel@bytesex.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.
	*/

	#ifndef _BTTVP_H_
	#define _BTTVP_H_

	#include <linux/version.h>
	#define BTTV_VERSION_CODE KERNEL_VERSION(0,9,16)

	#include <linux/types.h>
	#include <linux/wait.h>
	#include <linux/i2c.h>
	#include <linux/i2c-algo-bit.h>
	#include <linux/videodev.h>
	#include <linux/pci.h>
	#include <linux/input.h>
	#include <asm/scatterlist.h>
	#include <asm/io.h>

	#include <linux/device.h>
	#include <media/video-buf.h>
	#include <media/audiochip.h>
	#include <media/tuner.h>
	#include <media/tveeprom.h>
	#include <media/ir-common.h>

	#include "bt848.h"
	#include "bttv.h"
	#include "btcx-risc.h"

	#ifdef __KERNEL__

	#define FORMAT_FLAGS_DITHER 0x01
	#define FORMAT_FLAGS_PACKED 0x02
	#define FORMAT_FLAGS_PLANAR 0x04
	#define FORMAT_FLAGS_RAW 0x08
	#define FORMAT_FLAGS_CrCb 0x10

	#define RISC_SLOT_O_VBI 4
	#define RISC_SLOT_O_FIELD 6
	#define RISC_SLOT_E_VBI 10
	#define RISC_SLOT_E_FIELD 12
	#define RISC_SLOT_LOOP 14

	#define RESOURCE_OVERLAY 1
	#define RESOURCE_VIDEO 2
	#define RESOURCE_VBI 4

	#define RAW_LINES 640
	#define RAW_BPL 1024

	#define UNSET (-1U)

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

	struct bttv_tvnorm {
	int v4l2_id;
	char *name;
	u32 Fsc;
	u16 swidth, sheight; /* scaled standard width, height */
	u16 totalwidth;
	u8 adelay, bdelay, iform;
	u32 scaledtwidth;
	u16 hdelayx1, hactivex1;
	u16 vdelay;
	u8 vbipack;
	u16 vtotal;
	int sram;
	};
	extern const struct bttv_tvnorm bttv_tvnorms[];

	struct bttv_format {
	char *name;
	int palette; /* video4linux 1 */
	int fourcc; /* video4linux 2 */
	int btformat; /* BT848_COLOR_FMT_* */
	int btswap; /* BT848_COLOR_CTL_* */
	int depth; /* bit/pixel */
	int flags;
	int hshift,vshift; /* for planar modes */
	};

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

	struct bttv_geometry {
	u8 vtc,crop,comb;
	u16 width,hscale,hdelay;
	u16 sheight,vscale,vdelay,vtotal;
	};

	struct bttv_buffer {
	/* common v4l buffer stuff -- must be first */
	struct videobuf_buffer vb;

	/* bttv specific */
	const struct bttv_format *fmt;
	int tvnorm;
	int btformat;
	int btswap;
	struct bttv_geometry geo;
	struct btcx_riscmem top;
	struct btcx_riscmem bottom;
	};

	struct bttv_buffer_set {
	struct bttv_buffer top; / top field buffer */
	struct bttv_buffer bottom; / bottom field buffer */
	unsigned int top_irq;
	unsigned int frame_irq;
	};

	struct bttv_overlay {
	int tvnorm;
	struct v4l2_rect w;
	enum v4l2_field field;
	struct v4l2_clip *clips;
	int nclips;
	int setup_ok;
	};

	struct bttv_fh {
	struct bttv *btv;
	int resources;
	#ifdef VIDIOC_G_PRIORITY
	enum v4l2_priority prio;
	#endif
	enum v4l2_buf_type type;

	/* video capture */
	struct videobuf_queue cap;
	const struct bttv_format *fmt;
	int width;
	int height;

	/* current settings */
	const struct bttv_format *ovfmt;
	struct bttv_overlay ov;

	/* video overlay */
	struct videobuf_queue vbi;
	int lines;
	};

	/* ---------------------------------------------------------- */
	/* bttv-risc.c */

	/* risc code generators - capture */
	int bttv_risc_packed(struct bttv btv, struct btcx_riscmem risc,
	struct scatterlist *sglist,
	unsigned int offset, unsigned int bpl,
	unsigned int pitch, unsigned int lines);

	/* control dma register + risc main loop */
	void bttv_set_dma(struct bttv *btv, int override);
	int bttv_risc_init_main(struct bttv *btv);
	int bttv_risc_hook(struct bttv btv, int slot, struct btcx_riscmem risc,
	int irqflags);

	/* capture buffer handling */
	int bttv_buffer_risc(struct bttv btv, struct bttv_buffer buf);
	int bttv_buffer_activate_video(struct bttv *btv,
	struct bttv_buffer_set *set);
	int bttv_buffer_activate_vbi(struct bttv *btv,
	struct bttv_buffer *vbi);
	void bttv_dma_free(struct bttv btv, struct bttv_buffer buf);

	/* overlay handling */
	int bttv_overlay_risc(struct bttv btv, struct bttv_overlay ov,
	const struct bttv_format *fmt,
	struct bttv_buffer *buf);


	/* ---------------------------------------------------------- */
	/* bttv-vbi.c */

	void bttv_vbi_try_fmt(struct bttv_fh fh, struct v4l2_format f);
	void bttv_vbi_get_fmt(struct bttv_fh fh, struct v4l2_format f);
	void bttv_vbi_setlines(struct bttv_fh fh, struct bttv btv, int lines);

	extern struct videobuf_queue_ops bttv_vbi_qops;

	/* ---------------------------------------------------------- */
	/* bttv-gpio.c */


	extern struct bus_type bttv_sub_bus_type;
	int bttv_sub_add_device(struct bttv_core core, char name);
	int bttv_sub_del_devices(struct bttv_core *core);
	void bttv_gpio_irq(struct bttv_core *core);


	/* ---------------------------------------------------------- */
	/* bttv-driver.c */

	/* insmod options */
	extern unsigned int bttv_verbose;
	extern unsigned int bttv_debug;
	extern unsigned int bttv_gpio;
	extern void bttv_gpio_tracking(struct bttv btv, char comment);
	extern int init_bttv_i2c(struct bttv *btv);
	extern int fini_bttv_i2c(struct bttv *btv);

	#define vprintk if (bttv_verbose) printk
	#define dprintk if (bttv_debug >= 1) printk
	#define d2printk if (bttv_debug >= 2) printk

	#define BTTV_MAX_FBUF 0x208000
	#define VBIBUF_SIZE (2048VBI_MAXLINES2)
	#define BTTV_TIMEOUT (HZ/2) /* 0.5 seconds */
	#define BTTV_FREE_IDLE (HZ) /* one second */


	struct bttv_pll_info {
	unsigned int pll_ifreq; /* PLL input frequency */
	unsigned int pll_ofreq; /* PLL output frequency */
	unsigned int pll_crystal; /* Crystal used for input */
	unsigned int pll_current; /* Currently programmed ofreq */
	};

	/* for gpio-connected remote control */
	struct bttv_input {
	struct input_dev dev;
	struct ir_input_state ir;
	char name[32];
	char phys[32];
	u32 mask_keycode;
	u32 mask_keydown;
	};

	struct bttv_suspend_state {
	u32 gpio_enable;
	u32 gpio_data;
	int disabled;
	int loop_irq;
	struct bttv_buffer_set video;
	struct bttv_buffer *vbi;
	};

	struct bttv {
	struct bttv_core c;

	/* pci device config */
	unsigned short id;
	unsigned char revision;
	unsigned char __iomem bt848_mmio; / pointer to mmio */

	/* card configuration info */
	unsigned int cardid; /* pci subsystem id (bt878 based ones) */
	unsigned int tuner_type; /* tuner chip type */
	unsigned int pinnacle_id;
	unsigned int svhs;
	struct bttv_pll_info pll;
	int triton1;
	int gpioirq;
	int use_i2c_hw;

	/* old gpio interface */
	wait_queue_head_t gpioq;
	int shutdown;
	void (audio_hook)(struct bttv btv, struct video_audio *v, int set);

	/* new gpio interface */
	spinlock_t gpio_lock;

	/* i2c layer */
	struct i2c_algo_bit_data i2c_algo;
	struct i2c_client i2c_client;
	int i2c_state, i2c_rc;
	int i2c_done;
	wait_queue_head_t i2c_queue;

	/* video4linux (1) */
	struct video_device *video_dev;
	struct video_device *radio_dev;
	struct video_device *vbi_dev;

	/* infrared remote */
	int has_remote;
	struct bttv_input *remote;

	/* locking */
	spinlock_t s_lock;
	struct semaphore lock;
	int resources;
	struct semaphore reslock;
	#ifdef VIDIOC_G_PRIORITY
	struct v4l2_prio_state prio;
	#endif

	/* video state */
	unsigned int input;
	unsigned int audio;
	unsigned long freq;
	int tvnorm,hue,contrast,bright,saturation;
	struct v4l2_framebuffer fbuf;
	unsigned int field_count;

	/* various options */
	int opt_combfilter;
	int opt_lumafilter;
	int opt_automute;
	int opt_chroma_agc;
	int opt_adc_crush;
	int opt_vcr_hack;
	int opt_whitecrush_upper;
	int opt_whitecrush_lower;
	int opt_uv_ratio;
	int opt_full_luma_range;
	int opt_coring;

	/* radio data/state */
	int has_radio;
	int radio_user;

	/* miro/pinnacle + Aimslab VHX
	philips matchbox (tea5757 radio tuner) support */
	int has_matchbox;
	int mbox_we;
	int mbox_data;
	int mbox_clk;
	int mbox_most;
	int mbox_mask;

	/* ISA stuff (Terratec Active Radio Upgrade) */
	int mbox_ior;
	int mbox_iow;
	int mbox_csel;

	/* risc memory management data
	- must aquire s_lock before changing these
	- only the irq handler is supported to touch top + bottom + vcurr */
	struct btcx_riscmem main;
	struct bttv_buffer screen; / overlay */
	struct list_head capture; /* video capture queue */
	struct list_head vcapture; /* vbi capture queue */
	struct bttv_buffer_set curr; /* active buffers */
	struct bttv_buffer cvbi; / active vbi buffer */
	int loop_irq;
	int new_input;

	unsigned long cap_ctl;
	unsigned long dma_on;
	struct timer_list timeout;
	struct bttv_suspend_state state;

	/* stats */
	unsigned int errors;
	unsigned int framedrop;
	unsigned int irq_total;
	unsigned int irq_me;

	unsigned int users;
	struct bttv_fh init;
	};

	/* our devices */
	#define BTTV_MAX 16
	extern unsigned int bttv_num;
	extern struct bttv bttvs[BTTV_MAX];

	/* private ioctls */
	#define BTTV_VERSION _IOR('v' , BASE_VIDIOCPRIVATE+6, int)
	#define BTTV_VBISIZE _IOR('v' , BASE_VIDIOCPRIVATE+8, int)

	#endif

	#define btwrite(dat,adr) writel((dat), btv->bt848_mmio+(adr))
	#define btread(adr) readl(btv->bt848_mmio+(adr))

	#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 /* _BTTVP_H_ */

	/*
	* Local variables:
	* c-basic-offset: 8
	* End:
	*/