mpv/drivers/radeon/radeon_vid.c

/*
 *
 * radeon_vid.c
 *
 * Copyright (C) 2001 Nick Kurshev
 * 
 * BES YUV video overlay driver for Radeon/Rage128Pro/Rage128 cards
 * 
 * This software has been released under the terms of the GNU Public
 * license. See http://www.gnu.org/copyleft/gpl.html for details.
 *
 * This file is partly based on mga_vid and sis_vid stuff from
 * mplayer's package.
 * Also here was used code from CVS of GATOS project and X11 trees.
 */

#define RADEON_VID_VERSION "1.0.1"

/*
  It's entirely possible this major conflicts with something else
  mknod /dev/radeon_vid c 178 0
  or
  mknod /dev/rage128_vid c 178 0
  for Rage128/Rage128Pro chips (althrough it doesn't matter)
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  TESTED and WORKING formats: YUY2, UYVY, IYUV, I420, YV12
  -----------------------------------------------------------
  TODO:
  Highest priority: fbvid.h compatibility
  High priority: RGB/BGR 2-32, YVU9, IF09 support
  Middle priority:
     SCALER_GAMMA_SEL_BRIGHT  gamma correction ??? 
    OV0_AUTO_FLIP_CNTL
    OV0_FILTER_CNTL
    OV0_VIDEO_KEY_CLR
    OV0_KEY_CNTL
  Low priority:  CLPL, IYU1, IYU2, UYNV, CYUV
		 YUNV, YVYU, Y41P, Y211, Y41T, Y42T, V422, V655, CLJR
		       ^^^^
		 YUVP, UYVP, Mpeg PES (mpeg-1,2) support
*/

#include <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/byteorder/swab.h>

#include "radeon_vid.h"
#include "radeon.h"

#ifdef CONFIG_MTRR 
#include <asm/mtrr.h>
#endif

#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/io.h>

#define TRUE 1
#define FALSE 0

#define RADEON_VID_MAJOR 178


MODULE_AUTHOR("Nick Kurshev <nickols_k@mail.ru>");
#ifdef RAGE128
MODULE_DESCRIPTION("Accelerated YUV BES driver for Rage128. Version: "RADEON_VID_VERSION);
#else
MODULE_DESCRIPTION("Accelerated YUV BES driver for Radeons. Version: "RADEON_VID_VERSION);
#endif
#ifdef MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif
#ifdef CONFIG_MTRR 
MODULE_PARM(mtrr, "i");
MODULE_PARM_DESC(mtrr, "Tune MTRR (touch=1(default))");
static int mtrr __initdata = 1;
static struct { int vram; int vram_valid; } smtrr;
#endif
MODULE_PARM(swap_fourcc, "i");
MODULE_PARM_DESC(swap_fourcc, "Swap fourcc (dont't swap=0(default))");
static int swap_fourcc __initdata = 0;

#ifdef RAGE128
#define RVID_MSG "rage128_vid: "
#define X_ADJUST 0
#else
#define RVID_MSG "radeon_vid: "
#define X_ADJUST 8
#ifndef RADEON
#define RADEON
#endif
#endif

typedef struct bes_registers_s
{
  /* base address of yuv framebuffer */
  uint32_t yuv_base;
  uint32_t fourcc;
  /* YUV BES registers */
  uint32_t reg_load_cntl;
  uint32_t h_inc;
  uint32_t step_by;
  uint32_t y_x_start;
  uint32_t y_x_end;
  uint32_t v_inc;
  uint32_t p1_blank_lines_at_top;
  uint32_t p23_blank_lines_at_top;
  uint32_t vid_buf_pitch0_value;
  uint32_t vid_buf_pitch1_value;
  uint32_t p1_x_start_end;
  uint32_t p2_x_start_end;
  uint32_t p3_x_start_end;
  uint32_t base_addr;
  uint32_t vid_buf0_base_adrs;
  /* These ones are for auto flip: maybe in the future */
  uint32_t vid_buf1_base_adrs;
  uint32_t vid_buf2_base_adrs;
  uint32_t vid_buf3_base_adrs;
  uint32_t vid_buf4_base_adrs;
  uint32_t vid_buf5_base_adrs;

  uint32_t p1_v_accum_init;
  uint32_t p1_h_accum_init;
  uint32_t p23_v_accum_init;
  uint32_t p23_h_accum_init;
  uint32_t scale_cntl;
  uint32_t exclusive_horz;
  uint32_t auto_flip_cntl;
  uint32_t filter_cntl;
  uint32_t graphics_key_msk;
  uint32_t key_cntl;
  uint32_t test;
  /* Configurable stuff */
  int double_buff;
  int brightness;
  int saturation;
  uint32_t graphics_key_clr;
  int deinterlace_on;
  uint32_t deinterlace_pattern;
} bes_registers_t;

typedef struct video_registers_s
{
  uint32_t name;
  uint32_t value;
}video_registers_t;

static bes_registers_t besr;
static video_registers_t vregs[] = 
{
  { OV0_REG_LOAD_CNTL, 0 },
  { OV0_H_INC, 0 },
  { OV0_STEP_BY, 0 },
  { OV0_Y_X_START, 0 },
  { OV0_Y_X_END, 0 },
  { OV0_V_INC, 0 },
  { OV0_P1_BLANK_LINES_AT_TOP, 0 },
  { OV0_P23_BLANK_LINES_AT_TOP, 0 },
  { OV0_VID_BUF_PITCH0_VALUE, 0 },
  { OV0_VID_BUF_PITCH1_VALUE, 0 },
  { OV0_P1_X_START_END, 0 },
  { OV0_P2_X_START_END, 0 },
  { OV0_P3_X_START_END, 0 },
  { OV0_BASE_ADDR, 0 },
  { OV0_VID_BUF0_BASE_ADRS, 0 },
  { OV0_VID_BUF1_BASE_ADRS, 0 },
  { OV0_VID_BUF2_BASE_ADRS, 0 },
  { OV0_VID_BUF3_BASE_ADRS, 0 },
  { OV0_VID_BUF4_BASE_ADRS, 0 },
  { OV0_VID_BUF5_BASE_ADRS, 0 },
  { OV0_P1_V_ACCUM_INIT, 0 },
  { OV0_P1_H_ACCUM_INIT, 0 },
  { OV0_P23_V_ACCUM_INIT, 0 },
  { OV0_P23_H_ACCUM_INIT, 0 },
  { OV0_SCALE_CNTL, 0 },
  { OV0_EXCLUSIVE_HORZ, 0 },
  { OV0_AUTO_FLIP_CNTL, 0 },
  { OV0_FILTER_CNTL, 0 },
  { OV0_COLOUR_CNTL, 0 },
  { OV0_GRAPHICS_KEY_MSK, 0 },
  { OV0_GRAPHICS_KEY_CLR, 0 },
  { OV0_KEY_CNTL, 0 },
  { OV0_TEST, 0 }
};

static uint32_t radeon_vid_in_use = 0;

static uint8_t *radeon_mmio_base = 0;
static uint32_t radeon_mem_base = 0; 
static int32_t radeon_overlay_off = 0;
static uint32_t radeon_ram_size = 0;
#define PARAM_BUFF_SIZE 4096
static uint8_t *radeon_param_buff = NULL;
static uint32_t radeon_param_buff_size=0;
static uint32_t radeon_param_buff_len=0; /* real length of buffer */
static mga_vid_config_t radeon_config; 

#undef DEBUG
#if DEBUG
#define RTRACE		printk
#else
#define RTRACE(...)	((void)0)
#endif

static char *fourcc_format_name(int format)
{
    switch(format)
    {
	case IMGFMT_RGB8: return("RGB 8-bit");
	case IMGFMT_RGB15: return("RGB 15-bit");
	case IMGFMT_RGB16: return("RGB 16-bit");
	case IMGFMT_RGB24: return("RGB 24-bit");
	case IMGFMT_RGB32: return("RGB 32-bit");
	case IMGFMT_BGR8: return("BGR 8-bit");
	case IMGFMT_BGR15: return("BGR 15-bit");
	case IMGFMT_BGR16: return("BGR 16-bit");
	case IMGFMT_BGR24: return("BGR 24-bit");
	case IMGFMT_BGR32: return("BGR 32-bit");
	case IMGFMT_YVU9: return("Planar YVU9");
	case IMGFMT_IF09: return("Planar IF09");
	case IMGFMT_YV12: return("Planar YV12");
	case IMGFMT_I420: return("Planar I420");
	case IMGFMT_IYUV: return("Planar IYUV");
	case IMGFMT_CLPL: return("Planar CLPL");
	case IMGFMT_Y800: return("Planar Y800");
	case IMGFMT_Y8: return("Planar Y8");
	case IMGFMT_IUYV: return("Packed IUYV");
	case IMGFMT_IY41: return("Packed IY41");
	case IMGFMT_IYU1: return("Packed IYU1");
	case IMGFMT_IYU2: return("Packed IYU2");
	case IMGFMT_UYVY: return("Packed UYVY");
	case IMGFMT_UYNV: return("Packed UYNV");
	case IMGFMT_cyuv: return("Packed CYUV");
	case IMGFMT_Y422: return("Packed Y422");
	case IMGFMT_YUY2: return("Packed YUY2");
	case IMGFMT_YUNV: return("Packed YUNV");
	case IMGFMT_YVYU: return("Packed YVYU");
	case IMGFMT_Y41P: return("Packed Y41P");
	case IMGFMT_Y211: return("Packed Y211");
	case IMGFMT_Y41T: return("Packed Y41T");
	case IMGFMT_Y42T: return("Packed Y42T");
	case IMGFMT_V422: return("Packed V422");
	case IMGFMT_V655: return("Packed V655");
	case IMGFMT_CLJR: return("Packed CLJR");
	case IMGFMT_YUVP: return("Packed YUVP");
	case IMGFMT_UYVP: return("Packed UYVP");
	case IMGFMT_MPEGPES: return("Mpeg PES");
    }
    return("Unknown");
}


/*
 * IO macros
 */

#define INREG8(addr)		readb((radeon_mmio_base)+addr)
#define OUTREG8(addr,val)	writeb(val, (radeon_mmio_base)+addr)
#define INREG(addr)		readl((radeon_mmio_base)+addr)
#define OUTREG(addr,val)	writel(val, (radeon_mmio_base)+addr)

static void __init radeon_vid_save_state( void )
{
  size_t i;
  for(i=0;i<sizeof(vregs)/sizeof(video_registers_t);i++)
	vregs[i].value = INREG(vregs[i].name);
}

static void __exit radeon_vid_restore_state( void )
{
  size_t i;
  for(i=0;i<sizeof(vregs)/sizeof(video_registers_t);i++)
	OUTREG(vregs[i].name,vregs[i].value);
}

static void radeon_vid_stop_video( void )
{
    OUTREG(OV0_SCALE_CNTL, SCALER_SOFT_RESET);
    OUTREG(OV0_EXCLUSIVE_HORZ, 0);
    OUTREG(OV0_AUTO_FLIP_CNTL, 0);   /* maybe */
    OUTREG(OV0_FILTER_CNTL, 0x0000000f);
    OUTREG(OV0_KEY_CNTL, GRAPHIC_KEY_FN_NE);
    OUTREG(OV0_TEST, 0);
}

static void radeon_vid_display_video( void )
{
    int bes_flags;
RTRACE(RVID_MSG"OV0: v_inc=%x h_inc=%x step_by=%x\n",besr.v_inc,besr.h_inc,besr.step_by);
RTRACE(RVID_MSG"OV0: vid_buf0_base=%x\n",besr.vid_buf0_base_adrs);
RTRACE(RVID_MSG"OV0: y_x_start=%x y_x_end=%x blank_at_top=%x pitch0_value=%x\n"
,besr.y_x_start,besr.y_x_end,besr.p1_blank_lines_at_top,besr.vid_buf_pitch0_value);
RTRACE(RVID_MSG"OV0: p1_x_start_end=%x p2_x_start_end=%x p3_x_start-end=%x\n"
,besr.p1_x_start_end,besr.p2_x_start_end,besr.p2_x_start_end);
RTRACE(RVID_MSG"OV0: p1_v_accum_init=%x p1_h_accum_init=%x p23_h_accum_init=%x\n"
,besr.p1_v_accum_init,besr.p1_h_accum_init,besr.p23_h_accum_init);
    OUTREG(OV0_REG_LOAD_CNTL,		REG_LD_CTL_LOCK);
    while(!(INREG(OV0_REG_LOAD_CNTL)&REG_LD_CTL_LOCK_READBACK));

    OUTREG(OV0_AUTO_FLIP_CNTL,OV0_AUTO_FLIP_CNTL_SOFT_BUF_ODD);

    OUTREG(OV0_DEINTERLACE_PATTERN,besr.deinterlace_pattern);
   
    OUTREG(OV0_AUTO_FLIP_CNTL,(INREG(OV0_AUTO_FLIP_CNTL)^OV0_AUTO_FLIP_CNTL_SOFT_EOF_TOGGLE));
    OUTREG(OV0_AUTO_FLIP_CNTL,(INREG(OV0_AUTO_FLIP_CNTL)^OV0_AUTO_FLIP_CNTL_SOFT_EOF_TOGGLE));

    OUTREG(OV0_H_INC,			besr.h_inc);
    OUTREG(OV0_STEP_BY,			besr.step_by);
    OUTREG(OV0_Y_X_START,		besr.y_x_start);
    OUTREG(OV0_Y_X_END,			besr.y_x_end);
    OUTREG(OV0_V_INC,			besr.v_inc);
    OUTREG(OV0_P1_BLANK_LINES_AT_TOP,	besr.p1_blank_lines_at_top);
    OUTREG(OV0_P23_BLANK_LINES_AT_TOP,	besr.p23_blank_lines_at_top);
    OUTREG(OV0_VID_BUF_PITCH0_VALUE,	besr.vid_buf_pitch0_value);
    OUTREG(OV0_VID_BUF_PITCH1_VALUE,	besr.vid_buf_pitch1_value);
    OUTREG(OV0_P1_X_START_END,		besr.p1_x_start_end);
    OUTREG(OV0_P2_X_START_END,		besr.p2_x_start_end);
    OUTREG(OV0_P3_X_START_END,		besr.p3_x_start_end);
#if 0
    OUTREG(OV0_BASE_ADDR,		besr.base_addr);
#endif
    OUTREG(OV0_VID_BUF0_BASE_ADRS,	besr.vid_buf0_base_adrs);
    OUTREG(OV0_VID_BUF1_BASE_ADRS,	besr.vid_buf1_base_adrs);
    OUTREG(OV0_VID_BUF2_BASE_ADRS,	besr.vid_buf2_base_adrs);
    OUTREG(OV0_VID_BUF3_BASE_ADRS,	besr.vid_buf3_base_adrs);
    OUTREG(OV0_VID_BUF4_BASE_ADRS,	besr.vid_buf4_base_adrs);
    OUTREG(OV0_VID_BUF5_BASE_ADRS,	besr.vid_buf5_base_adrs);
    OUTREG(OV0_P1_V_ACCUM_INIT,		besr.p1_v_accum_init);
    OUTREG(OV0_P1_H_ACCUM_INIT,		besr.p1_h_accum_init);
    OUTREG(OV0_P23_H_ACCUM_INIT,	besr.p23_h_accum_init);
    OUTREG(OV0_P23_V_ACCUM_INIT,	besr.p23_v_accum_init);

    bes_flags = SCALER_ENABLE |
                SCALER_SMART_SWITCH |
                SCALER_HORZ_PICK_NEAREST;
    if(besr.double_buff) bes_flags |= SCALER_DOUBLE_BUFFER;
    if(besr.deinterlace_on) bes_flags |= SCALER_ADAPTIVE_DEINT;
#ifdef RAGE128
    bes_flags |= SCALER_BURST_PER_PLANE;
#endif
    switch(besr.fourcc)
    {
        case IMGFMT_RGB15:
        case IMGFMT_BGR15: bes_flags |= SCALER_SOURCE_15BPP; break;
        case IMGFMT_RGB16:
	case IMGFMT_BGR16: bes_flags |= SCALER_SOURCE_16BPP; break;
        case IMGFMT_RGB24:
        case IMGFMT_BGR24: bes_flags |= SCALER_SOURCE_24BPP; break;
        case IMGFMT_RGB32:
	case IMGFMT_BGR32: bes_flags |= SCALER_SOURCE_32BPP; break;
        /* 4:1:0*/
	case IMGFMT_IF09:
        case IMGFMT_YVU9:  bes_flags |= SCALER_SOURCE_YUV9; break;
        /* 4:2:0 */
	case IMGFMT_IYUV:
	case IMGFMT_I420:
	case IMGFMT_YV12:  bes_flags |= SCALER_SOURCE_YUV12;  break;
        /* 4:2:2 */
	case IMGFMT_UYVY:  bes_flags |= SCALER_SOURCE_YVYU422; break;
	case IMGFMT_YUY2:
	default:           bes_flags |= SCALER_SOURCE_VYUY422; break;
    }
RTRACE(RVID_MSG"OV0: SCALER=%x\n",bes_flags);
    OUTREG(OV0_SCALE_CNTL,		bes_flags);
    OUTREG(OV0_REG_LOAD_CNTL,		0);
}

#define XXX_SRC_X   0
#define XXX_SRC_Y   0

#define XXX_WIDTH   config->src_width
#define XXX_HEIGHT  config->src_height

#define XXX_DRW_W   config->dest_width
#define XXX_DRW_H   config->dest_height

static int radeon_vid_init_video( mga_vid_config_t *config )
{
    uint32_t tmp,src_w,src_h,pitch,h_inc,step_by,left,leftUV,top;
    int is_420;
RTRACE(RVID_MSG"usr_config: version = %x format=%x card=%x ram=%u src(%ux%u) dest(%u:%ux%u:%u) frame_size=%u num_frames=%u\n"
	,(uint32_t)config->version
	,(uint32_t)config->format
	,(uint32_t)config->card_type
	,(uint32_t)config->ram_size
	,(uint32_t)config->src_width
	,(uint32_t)config->src_height
	,(uint32_t)config->x_org
	,(uint32_t)config->y_org
	,(uint32_t)config->dest_width
	,(uint32_t)config->dest_height
	,(uint32_t)config->frame_size
	,(uint32_t)config->num_frames);
    radeon_vid_stop_video();
    left = XXX_SRC_X << 16;
    top = XXX_SRC_Y << 16;
    src_h = config->src_height;
    src_w = config->src_width;
    switch(config->format)
    {
        case IMGFMT_RGB15:
        case IMGFMT_BGR15:
        case IMGFMT_RGB16:
	case IMGFMT_BGR16:
        case IMGFMT_RGB24:
        case IMGFMT_BGR24:
        case IMGFMT_RGB32:
	case IMGFMT_BGR32:
	/* 4:1:0 */
	case IMGFMT_IF09:
        case IMGFMT_YVU9:
	/* 4:2:0 */	
	case IMGFMT_IYUV:
	case IMGFMT_YV12:
	case IMGFMT_I420:
	/* 4:2:2 */
	case IMGFMT_UYVY:
	case IMGFMT_YUY2:
				break;
	default:
		printk(RVID_MSG"Unsupported pixel format: 0x%X\n",config->format);
		return -1;
    }
    is_420 = 0;
    if(config->format == IMGFMT_YV12 ||
       config->format == IMGFMT_I420 ||
       config->format == IMGFMT_IYUV) is_420 = 1;
    switch(config->format)
    {
	/* 4:1:0 */
        case IMGFMT_YVU9:
        case IMGFMT_IF09:
	/* 4:2:0 */
	case IMGFMT_IYUV:
	case IMGFMT_YV12:
	case IMGFMT_I420: pitch = (src_w + 31) & ~31; break;
	/* 4:2:2 */
        default:
	case IMGFMT_UYVY:
	case IMGFMT_YUY2:
        case IMGFMT_RGB15:
        case IMGFMT_BGR15:
        case IMGFMT_RGB16:
	case IMGFMT_BGR16: pitch = ((src_w*2) + 15) & ~15; break;
        case IMGFMT_RGB24:
        case IMGFMT_BGR24: pitch = ((src_w*3) + 15) & ~15; break;
        case IMGFMT_RGB32:
	case IMGFMT_BGR32: pitch = ((src_w*4) + 15) & ~15; break;
    }
    
    besr.fourcc = config->format;

    besr.v_inc = (src_h << 20) / XXX_DRW_H;
    h_inc = (src_w << 12) / XXX_DRW_W;
    step_by = 1;

    while(h_inc >= (2 << 12)) {
	step_by++;
	h_inc >>= 1;
    }

    /* keep everything in 16.16 */
    besr.base_addr = radeon_mem_base;
    if(is_420)
    {
        uint32_t d1line,d2line,d3line;
	d1line = top*pitch;
	d2line = src_h*pitch+(d1line>>1);
	d3line = d2line+((src_h*pitch)>>2);
	d1line += (left >> 16) & ~15;
	d2line += (left >> 17) & ~15;
	d3line += (left >> 17) & ~15;
        besr.vid_buf0_base_adrs=((radeon_overlay_off+d1line)&VIF_BUF0_BASE_ADRS_MASK);
        besr.vid_buf1_base_adrs=((radeon_overlay_off+d2line)&VIF_BUF1_BASE_ADRS_MASK)|VIF_BUF1_PITCH_SEL;
        besr.vid_buf2_base_adrs=((radeon_overlay_off+d3line)&VIF_BUF2_BASE_ADRS_MASK)|VIF_BUF2_PITCH_SEL;
	if(besr.fourcc == IMGFMT_I420 || besr.fourcc == IMGFMT_IYUV)
	{
	  uint32_t tmp;
	  tmp = besr.vid_buf1_base_adrs;
	  besr.vid_buf1_base_adrs = besr.vid_buf2_base_adrs;
	  besr.vid_buf2_base_adrs = tmp;
	}
    }
    else
    {
      besr.vid_buf0_base_adrs = radeon_overlay_off;
      besr.vid_buf0_base_adrs += ((left & ~7) << 1)&VIF_BUF0_BASE_ADRS_MASK;
      besr.vid_buf1_base_adrs = besr.vid_buf0_base_adrs;
      besr.vid_buf2_base_adrs = besr.vid_buf0_base_adrs;
    }
    besr.vid_buf3_base_adrs = besr.vid_buf0_base_adrs+config->frame_size;
    besr.vid_buf4_base_adrs = besr.vid_buf1_base_adrs+config->frame_size;
    besr.vid_buf5_base_adrs = besr.vid_buf2_base_adrs+config->frame_size;

    tmp = (left & 0x0003ffff) + 0x00028000 + (h_inc << 3);
    besr.p1_h_accum_init = ((tmp <<  4) & 0x000f8000) |
			   ((tmp << 12) & 0xf0000000);

    tmp = ((left >> 1) & 0x0001ffff) + 0x00028000 + (h_inc << 2);
    besr.p23_h_accum_init = ((tmp <<  4) & 0x000f8000) |
			    ((tmp << 12) & 0x70000000);
    tmp = (top & 0x0000ffff) + 0x00018000;
    besr.p1_v_accum_init = ((tmp << 4) & OV0_P1_V_ACCUM_INIT_MASK)
			    |(OV0_P1_MAX_LN_IN_PER_LN_OUT & 1);

    tmp = ((top >> 1) & 0x0000ffff) + 0x00018000;
    besr.p23_v_accum_init = is_420 ? ((tmp << 4) & OV0_P23_V_ACCUM_INIT_MASK)
			    |(OV0_P23_MAX_LN_IN_PER_LN_OUT & 1) : 0;

    leftUV = (left >> 17) & 15;
    left = (left >> 16) & 15;
    besr.h_inc = h_inc | ((h_inc >> 1) << 16);
    besr.step_by = step_by | (step_by << 8);
    besr.y_x_start = (config->x_org+X_ADJUST) | (config->y_org << 16);
    besr.y_x_end = (config->x_org + config->dest_width+X_ADJUST) | ((config->y_org + config->dest_height) << 16);
    besr.p1_blank_lines_at_top = P1_BLNK_LN_AT_TOP_M1_MASK|((src_h-1)<<16);
    if(is_420)
    {
	src_h = (src_h + 1) >> 1;
	besr.p23_blank_lines_at_top = P23_BLNK_LN_AT_TOP_M1_MASK|((src_h-1)<<16);
    }
    else besr.p23_blank_lines_at_top = 0;
    besr.vid_buf_pitch0_value = pitch;
    besr.vid_buf_pitch1_value = is_420 ? pitch>>1 : pitch;
RTRACE(RVID_MSG"BES: v_inc=%x h_inc=%x step_by=%x\n",besr.v_inc,besr.h_inc,besr.step_by);
RTRACE(RVID_MSG"BES: vid_buf0_basey=%x\n",besr.vid_buf0_base_adrs);
RTRACE(RVID_MSG"BES: y_x_start=%x y_x_end=%x blank_at_top=%x pitch0_value=%x\n"
,besr.y_x_start,besr.y_x_end,besr.p1_blank_lines_at_top,besr.vid_buf_pitch0_value);
    besr.p1_x_start_end = (src_w+left-1)|(left<<16);
    src_w>>=1;
    besr.p2_x_start_end = (src_w+left-1)|(leftUV<<16);
    besr.p3_x_start_end = besr.p2_x_start_end;
    return 0;
}

static void radeon_vid_frame_sel(int frame)
{
    uint32_t off0,off1,off2;
    if(!besr.double_buff) return;
    if(frame%2)
    {
      off0 = besr.vid_buf3_base_adrs;
      off1 = besr.vid_buf4_base_adrs;
      off2 = besr.vid_buf5_base_adrs;
    }
    else
    {
      off0 = besr.vid_buf0_base_adrs;
      off1 = besr.vid_buf1_base_adrs;
      off2 = besr.vid_buf2_base_adrs;
    }
    OUTREG(OV0_REG_LOAD_CNTL,		REG_LD_CTL_LOCK);
    while(!(INREG(OV0_REG_LOAD_CNTL)&REG_LD_CTL_LOCK_READBACK));
    OUTREG(OV0_VID_BUF0_BASE_ADRS,	off0);
    OUTREG(OV0_VID_BUF1_BASE_ADRS,	off1);
    OUTREG(OV0_VID_BUF2_BASE_ADRS,	off2);
    OUTREG(OV0_REG_LOAD_CNTL,		0);
}

static void radeon_vid_make_default(void)
{
  besr.deinterlace_pattern = 0x900AAAAA;
  OUTREG(OV0_DEINTERLACE_PATTERN,besr.deinterlace_pattern);
  besr.deinterlace_on=1;
  besr.double_buff=1;
}


static void radeon_vid_preset(void)
{
  unsigned tmp;
  tmp = INREG(OV0_COLOUR_CNTL);
  besr.saturation = (tmp>>8)&0x1f;
  besr.brightness = tmp & 0x7f;
  besr.graphics_key_clr = INREG(OV0_GRAPHICS_KEY_CLR);
  besr.deinterlace_pattern = INREG(OV0_DEINTERLACE_PATTERN);
}

static int video_on = 0;

static int radeon_vid_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
	int frame;

	switch(cmd)
	{
		case MGA_VID_CONFIG:
			RTRACE( "radeon_mmio_base = %p\n",radeon_mmio_base);
			RTRACE( "radeon_mem_base = %08x\n",radeon_mem_base);
			RTRACE(RVID_MSG"Received configuration\n");

 			if(copy_from_user(&radeon_config,(mga_vid_config_t*) arg,sizeof(mga_vid_config_t)))
			{
				printk(RVID_MSG"failed copy from userspace\n");
				return -EFAULT;
			}
			if(radeon_config.version != MGA_VID_VERSION){
				printk(RVID_MSG"incompatible version! driver: %X  requested: %X\n",MGA_VID_VERSION,radeon_config.version);
				return -EFAULT;
			}

			if(radeon_config.frame_size==0 || radeon_config.frame_size>1024*768*2){
				printk(RVID_MSG"illegal frame_size: %d\n",radeon_config.frame_size);
				return -EFAULT;
			}

			if(radeon_config.num_frames<1 || radeon_config.num_frames>4){
				printk(RVID_MSG"illegal num_frames: %d\n",radeon_config.num_frames);
				return -EFAULT;
			}

			radeon_config.card_type = 0;
			radeon_config.ram_size = radeon_ram_size;
			radeon_overlay_off = radeon_ram_size*0x100000 - radeon_config.frame_size*radeon_config.num_frames;
			radeon_overlay_off &= 0xffff0000;
			if(radeon_overlay_off < 0){
			    printk(RVID_MSG"not enough video memory. Need: %u has: %u\n",radeon_config.frame_size*radeon_config.num_frames,radeon_ram_size*0x100000);
			    return -EFAULT;
			}
			RTRACE(RVID_MSG"using video overlay at offset %p\n",radeon_overlay_off);
			if (copy_to_user((mga_vid_config_t *) arg, &radeon_config, sizeof(mga_vid_config_t)))
			{
				printk(RVID_MSG"failed copy to userspace\n");
				return -EFAULT;
			}
			if(swap_fourcc) radeon_config.format = swab32(radeon_config.format); 
			printk(RVID_MSG"configuring for '%s' fourcc\n",fourcc_format_name(radeon_config.format));
			return radeon_vid_init_video(&radeon_config);
		break;

		case MGA_VID_ON:
			RTRACE(RVID_MSG"Video ON (ioctl)\n");
			radeon_vid_display_video();
			video_on = 1;
		break;

		case MGA_VID_OFF:
			RTRACE(RVID_MSG"Video OFF (ioctl)\n");
			if(video_on) radeon_vid_stop_video();
			video_on = 0;
		break;

		case MGA_VID_FSEL:
			if(copy_from_user(&frame,(int *) arg,sizeof(int)))
			{
				printk(RVID_MSG"FSEL failed copy from userspace\n");
				return(-EFAULT);
			}
			radeon_vid_frame_sel(frame);
		break;

	        default:
			printk(RVID_MSG"Invalid ioctl\n");
			return (-EINVAL);
	}

	return 0;
}

struct ati_card_id_s
{
  const int id;
  const char name[17];
};

const struct ati_card_id_s ati_card_ids[]=
{
#ifdef RAGE128
 /*
    This driver should be compatible with Rage128 (pro) chips.
    (include adaptive deinterlacing!!!).
    Moreover: the same logic can be used with Mach64 chips.
    (I mean: mach64xx, 3d rage, 3d rage IIc, 3D rage pro, 3d rage mobility).
    but they are incompatible by i/o ports. So if enthusiasts will want
    then they can redefine OUTREG and INREG macros and redefine OV0_*
    constants. Also it seems that mach64 chips supports only: YUY2, YV12, UYVY
    fourccs (422 and 420 formats only).
  */
/* Rage128 Pro GL */
 { PCI_DEVICE_ID_ATI_Rage128_PA, "R128Pro PA" },
 { PCI_DEVICE_ID_ATI_Rage128_PB, "R128Pro PB" },
 { PCI_DEVICE_ID_ATI_Rage128_PC, "R128Pro PC" },
 { PCI_DEVICE_ID_ATI_Rage128_PD, "R128Pro PD" },
 { PCI_DEVICE_ID_ATI_Rage128_PE, "R128Pro PE" },
 { PCI_DEVICE_ID_ATI_RAGE128_PF, "R128Pro PF" },
/* Rage128 Pro VR */
 { PCI_DEVICE_ID_ATI_RAGE128_PG, "R128Pro PG" },
 { PCI_DEVICE_ID_ATI_RAGE128_PH, "R128Pro PH" },
 { PCI_DEVICE_ID_ATI_RAGE128_PI, "R128Pro PI" },
 { PCI_DEVICE_ID_ATI_RAGE128_PJ, "R128Pro PJ" },
 { PCI_DEVICE_ID_ATI_RAGE128_PK, "R128Pro PK" },
 { PCI_DEVICE_ID_ATI_RAGE128_PL, "R128Pro PL" },
 { PCI_DEVICE_ID_ATI_RAGE128_PM, "R128Pro PM" },
 { PCI_DEVICE_ID_ATI_RAGE128_PN, "R128Pro PN" },
 { PCI_DEVICE_ID_ATI_RAGE128_PO, "R128Pro PO" },
 { PCI_DEVICE_ID_ATI_RAGE128_PP, "R128Pro PP" },
 { PCI_DEVICE_ID_ATI_RAGE128_PQ, "R128Pro PQ" },
 { PCI_DEVICE_ID_ATI_RAGE128_PR, "R128Pro PR" },
 { PCI_DEVICE_ID_ATI_RAGE128_TR, "R128Pro TR" },
 { PCI_DEVICE_ID_ATI_RAGE128_PS, "R128Pro PS" },
 { PCI_DEVICE_ID_ATI_RAGE128_PT, "R128Pro PT" },
 { PCI_DEVICE_ID_ATI_RAGE128_PU, "R128Pro PU" },
 { PCI_DEVICE_ID_ATI_RAGE128_PV, "R128Pro PV" },
 { PCI_DEVICE_ID_ATI_RAGE128_PW, "R128Pro PW" },
 { PCI_DEVICE_ID_ATI_RAGE128_PX, "R128Pro PX" },
/* Rage128 GL */
 { PCI_DEVICE_ID_ATI_RAGE128_RE, "R128 RE" },
 { PCI_DEVICE_ID_ATI_RAGE128_RF, "R128 RF" },
 { PCI_DEVICE_ID_ATI_RAGE128_RG, "R128 RG" },
 { PCI_DEVICE_ID_ATI_RAGE128_RH, "R128 RH" },
 { PCI_DEVICE_ID_ATI_RAGE128_RI, "R128 RI" },
/* Rage128 VR */
 { PCI_DEVICE_ID_ATI_RAGE128_RK, "R128 RK" },
 { PCI_DEVICE_ID_ATI_RAGE128_RL, "R128 RL" },
 { PCI_DEVICE_ID_ATI_RAGE128_RM, "R128 RM" },
 { PCI_DEVICE_ID_ATI_RAGE128_RN, "R128 RN" },
 { PCI_DEVICE_ID_ATI_RAGE128_RO, "R128 RO" },
/* Rage128 M3 */
 { PCI_DEVICE_ID_ATI_RAGE128_LE, "R128 M3 LE" },
 { PCI_DEVICE_ID_ATI_RAGE128_LF, "R128 M3 LF" },
/* Rage128 Pro Ultra */
 { PCI_DEVICE_ID_ATI_RAGE128_U1, "R128Pro U1" },
 { PCI_DEVICE_ID_ATI_RAGE128_U2, "R128Pro U2" },
 { PCI_DEVICE_ID_ATI_RAGE128_U3, "R128Pro U3" }
#else
/* Radeons (indeed: Rage 256 Pro ;) */
 { PCI_DEVICE_ID_RADEON_QD, "Radeon QD " },
 { PCI_DEVICE_ID_RADEON_QE, "Radeon QE " },
 { PCI_DEVICE_ID_RADEON_QF, "Radeon QF " },
 { PCI_DEVICE_ID_RADEON_QG, "Radeon QG " },
 { PCI_DEVICE_ID_RADEON_QY, "Radeon VE QY " },
 { PCI_DEVICE_ID_RADEON_QZ, "Radeon VE QZ " },
 { PCI_DEVICE_ID_RADEON_LY, "Radeon M6 LY " },
 { PCI_DEVICE_ID_RADEON_LZ, "Radeon M6 LZ " },
 { PCI_DEVICE_ID_RADEON_LW, "Radeon M7 LW " },
 { PCI_DEVICE_ID_R200_QL,   "Radeon2 8500 QL " },
 { PCI_DEVICE_ID_RV200_QW,  "Radeon2 7500 QW " }
#endif
};

static int detected_chip;

static int __init radeon_vid_config_card(void)
{
	struct pci_dev *dev = NULL;
	size_t i;

	for(i=0;i<sizeof(ati_card_ids)/sizeof(struct ati_card_id_s);i++)
	  if((dev=pci_find_device(PCI_VENDOR_ID_ATI, ati_card_ids[i].id, NULL)))
		break;
	if(!dev)
	{
		printk(RVID_MSG"No supported cards found\n");
		return FALSE;
	}

	radeon_mmio_base = ioremap_nocache(pci_resource_start (dev, 2),RADEON_REGSIZE);
	radeon_mem_base =  dev->resource[0].start;

	RTRACE(RVID_MSG"MMIO at 0x%p\n", radeon_mmio_base);
	RTRACE(RVID_MSG"Frame Buffer at 0x%08x\n", radeon_mem_base);

	/* video memory size */
	radeon_ram_size = INREG(CONFIG_MEMSIZE);

	/* mem size is bits [28:0], mask off the rest. Range: from 1Mb up to 512 Mb */
	radeon_ram_size &=  CONFIG_MEMSIZE_MASK;
	radeon_ram_size /= 0x100000;
	detected_chip = i;
	printk(RVID_MSG"Found %s (%uMb memory)\n",ati_card_ids[i].name,radeon_ram_size);

	return TRUE;
}

#define PARAM_BRIGHTNESS "brightness="
#define PARAM_SATURATION "saturation="
#define PARAM_DOUBLE_BUFF "double_buff="
#define PARAM_COLOUR_KEY "colour_key="
#define PARAM_DEINTERLACE "deinterlace="
#define PARAM_DEINTERLACE_PATTERN "deinterlace_pattern="

static void radeon_param_buff_fill( void )
{
    unsigned len,saturation;
    long brightness;
    brightness = besr.brightness;
    saturation = besr.saturation;
    len = 0;
    len += sprintf(&radeon_param_buff[len],"Interface version: %04X\nDriver version: %s\n",MGA_VID_VERSION,RADEON_VID_VERSION);
    len += sprintf(&radeon_param_buff[len],"Chip: %s\n",ati_card_ids[detected_chip].name);
    len += sprintf(&radeon_param_buff[len],"Memory: %p:%x\n",radeon_mem_base,radeon_ram_size*0x100000);
    len += sprintf(&radeon_param_buff[len],"MMIO: %p\n",radeon_mmio_base);
    len += sprintf(&radeon_param_buff[len],"Overlay offset: %p\n",radeon_overlay_off);
    len += sprintf(&radeon_param_buff[len],"Tune MTRR: %s\n",mtrr?"on":"off");
    len += sprintf(&radeon_param_buff[len],"Swapped fourcc: %s\n",swap_fourcc?"on":"off");
    len += sprintf(&radeon_param_buff[len],"Last fourcc: %s\n\n",fourcc_format_name(besr.fourcc));
    len += sprintf(&radeon_param_buff[len],"Configurable stuff:\n");
    len += sprintf(&radeon_param_buff[len],"~~~~~~~~~~~~~~~~~~~\n");
    len += sprintf(&radeon_param_buff[len],PARAM_DOUBLE_BUFF"%s\n",besr.double_buff?"on":"off");
    len += sprintf(&radeon_param_buff[len],PARAM_BRIGHTNESS"%i\n",brightness);
    len += sprintf(&radeon_param_buff[len],PARAM_SATURATION"%u\n",saturation);
    len += sprintf(&radeon_param_buff[len],PARAM_COLOUR_KEY"%X\n",besr.graphics_key_clr);
    len += sprintf(&radeon_param_buff[len],PARAM_DEINTERLACE"%s\n",besr.deinterlace_on?"on":"off");
    len += sprintf(&radeon_param_buff[len],PARAM_DEINTERLACE_PATTERN"%X\n",besr.deinterlace_pattern);
    radeon_param_buff_len = len;
}

static ssize_t radeon_vid_read(struct file *file, char *buf, size_t count, loff_t *ppos)
{
    uint32_t size;
    if(!radeon_param_buff) return -ESPIPE;
    if(!(*ppos)) radeon_param_buff_fill();
    if(*ppos >= radeon_param_buff_len) return 0;
    size = min(count,radeon_param_buff_len-(uint32_t)(*ppos));
    memcpy(buf,radeon_param_buff,size);
    *ppos += size;
    return size;
}

static ssize_t radeon_vid_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
    if(memcmp(buf,PARAM_BRIGHTNESS,min(count,strlen(PARAM_BRIGHTNESS))) == 0)
    {
      long brightness;
      brightness=simple_strtol(&buf[strlen(PARAM_BRIGHTNESS)],NULL,10);
      if(brightness >= -64 && brightness <= 63)
	OUTREG(OV0_COLOUR_CNTL, (brightness & 0x7f) |
				(besr.saturation << 8) |
				(besr.saturation << 16));
    }
    else
    if(memcmp(buf,PARAM_SATURATION,min(count,strlen(PARAM_SATURATION))) == 0)
    {
      long saturation;
      saturation=simple_strtol(&buf[strlen(PARAM_SATURATION)],NULL,10);
      if(saturation >= 0 && saturation <= 31)
	OUTREG(OV0_COLOUR_CNTL, (besr.brightness & 0x7f) |
				(saturation << 8) |
				(saturation << 16));
    }
    else
    if(memcmp(buf,PARAM_DOUBLE_BUFF,min(count,strlen(PARAM_DOUBLE_BUFF))) == 0)
    {
      if(memcmp(&buf[strlen(PARAM_DOUBLE_BUFF)],"on",2) == 0) besr.double_buff = 1;
      else besr.double_buff = 0;
    }
    else
    if(memcmp(buf,PARAM_COLOUR_KEY,min(count,strlen(PARAM_COLOUR_KEY))) == 0)
    {
      long ckey;
      ckey=simple_strtol(&buf[strlen(PARAM_COLOUR_KEY)],NULL,16);
	OUTREG(OV0_GRAPHICS_KEY_CLR, ckey);
    }
    else
    if(memcmp(buf,PARAM_DEINTERLACE,min(count,strlen(PARAM_DEINTERLACE))) == 0)
    {
      if(memcmp(&buf[strlen(PARAM_DEINTERLACE)],"on",2) == 0) besr.deinterlace_on = 1;
      else besr.deinterlace_on = 0;
    }
    else
    if(memcmp(buf,PARAM_DEINTERLACE_PATTERN,min(count,strlen(PARAM_DEINTERLACE_PATTERN))) == 0)
    {
      long dpat;
      dpat=simple_strtol(&buf[strlen(PARAM_DEINTERLACE_PATTERN)],NULL,16);
	OUTREG(OV0_DEINTERLACE_PATTERN, dpat);
    }
    else count = -EIO;
    radeon_vid_preset();
    return count;
}

static int radeon_vid_mmap(struct file *file, struct vm_area_struct *vma)
{

	RTRACE(RVID_MSG"mapping video memory into userspace\n");
	if(remap_page_range(vma->vm_start, radeon_mem_base + radeon_overlay_off,
		 vma->vm_end - vma->vm_start, vma->vm_page_prot)) 
	{
		printk(RVID_MSG"error mapping video memory\n");
		return(-EAGAIN);
	}

	return(0);
}

static int radeon_vid_release(struct inode *inode, struct file *file)
{
	radeon_vid_in_use = 0;
	radeon_vid_stop_video();

	MOD_DEC_USE_COUNT;
	return 0;
}

static long long radeon_vid_lseek(struct file *file, long long offset, int origin)
{
	return -ESPIPE;
}					 

static int radeon_vid_open(struct inode *inode, struct file *file)
{
	int minor = MINOR(inode->i_rdev);

	if(minor != 0)
	 return(-ENXIO);

	if(radeon_vid_in_use == 1) 
		return(-EBUSY);

	radeon_vid_in_use = 1;
	MOD_INC_USE_COUNT;
	return(0);
}

#if LINUX_VERSION_CODE >= 0x020400
static struct file_operations radeon_vid_fops =
{
	llseek:		radeon_vid_lseek,
	read:			radeon_vid_read,
	write:		radeon_vid_write,
	ioctl:		radeon_vid_ioctl,
	mmap:			radeon_vid_mmap,
	open:			radeon_vid_open,
	release: 	radeon_vid_release
};
#else
static struct file_operations radeon_vid_fops =
{
	radeon_vid_lseek,
	radeon_vid_read,
	radeon_vid_write,
	NULL,
	NULL,
	radeon_vid_ioctl,
	radeon_vid_mmap,
	radeon_vid_open,
	NULL,
	radeon_vid_release
};
#endif

/* 
 * Main Initialization Function 
 */

static int __init radeon_vid_initialize(void)
{
	radeon_vid_in_use = 0;
#ifdef RAGE128
	printk(RVID_MSG"Rage128/Rage128Pro video overlay driver v"RADEON_VID_VERSION" (C) Nick Kurshev\n");
#else
	printk(RVID_MSG"Radeon video overlay driver v"RADEON_VID_VERSION" (C) Nick Kurshev\n");
#endif
	if(register_chrdev(RADEON_VID_MAJOR, "radeon_vid", &radeon_vid_fops))
	{
		printk(RVID_MSG"unable to get major: %d\n", RADEON_VID_MAJOR);
		return -EIO;
	}

	if (!radeon_vid_config_card())
	{
		printk(RVID_MSG"can't configure this card\n");
		unregister_chrdev(RADEON_VID_MAJOR, "radeon_vid");
		return -EINVAL;
	}
	radeon_param_buff = kmalloc(PARAM_BUFF_SIZE,GFP_KERNEL);
	if(radeon_param_buff) radeon_param_buff_size = PARAM_BUFF_SIZE;
	radeon_vid_save_state();
	radeon_vid_make_default();
	radeon_vid_preset();
#ifdef CONFIG_MTRR
	if (mtrr) {
		smtrr.vram = mtrr_add(radeon_mem_base,
				radeon_ram_size*0x100000, MTRR_TYPE_WRCOMB, 1);
		smtrr.vram_valid = 1;
		/* let there be speed */
		printk(RVID_MSG"MTRR set to ON\n");
	}
#endif /* CONFIG_MTRR */
	return(0);
}

int __init init_module(void)
{
	return radeon_vid_initialize();
}

void __exit cleanup_module(void)
{
	radeon_vid_restore_state();
	if(radeon_mmio_base)
		iounmap(radeon_mmio_base);
	kfree(radeon_param_buff);
	RTRACE(RVID_MSG"Cleaning up module\n");
	unregister_chrdev(RADEON_VID_MAJOR, "radeon_vid");
#ifdef CONFIG_MTRR
        if (smtrr.vram_valid)
            mtrr_del(smtrr.vram, radeon_mem_base,
                     radeon_ram_size*0x100000);
#endif /* CONFIG_MTRR */
}