sis_bridge.c

来自「君正早期ucos系统(只有早期的才不没有打包成库),MPLAYER,文件系统,图」· C语言 代码 · 共 694 行 · 第 1/2 页

    else if (CR32 & 0x02)
	sis_vbflags |= TV_SVIDEO;
    else if (CR32 & 0x01)
	sis_vbflags |= TV_AVIDEO;
    else if (CR32 & 0x40)
	sis_vbflags |= (TV_SVIDEO | TV_HIVISION);
    else if ((CR38 & 0x04) && (sis_vbflags & (VB_301LV | VB_302LV)))
	sis_vbflags |= TV_HIVISION_LV;
    else if ((CR38 & 0x04) && (sis_vbflags & VB_CHRONTEL))
	sis_vbflags |= (TV_CHSCART | TV_PAL);
    else if ((CR38 & 0x08) && (sis_vbflags & VB_CHRONTEL))
	sis_vbflags |= (TV_CHHDTV | TV_NTSC);

    if (sis_vbflags & (TV_SCART | TV_SVIDEO | TV_AVIDEO | TV_HIVISION)) {
	if (sis_vga_engine == SIS_300_VGA) {
	    /* TW: Should be SR38 here as well, but this
	     *     does not work. Looks like a BIOS bug (2.04.5c).
	     */
	    if (SR16 & 0x20)
		sis_vbflags |= TV_PAL;
	    else
		sis_vbflags |= TV_NTSC;
	} else if ((sis_device_id == DEVICE_SIS_550_VGA)) {
	    inSISIDXREG(SISCR, 0x79, CR79);
	    if (CR79 & 0x08) {
		inSISIDXREG(SISCR, 0x79, CR79);
		CR79 >>= 5;
	    }
	    if (CR79 & 0x01) {
		sis_vbflags |= TV_PAL;
		if (CR38 & 0x40)
		    sis_vbflags |= TV_PALM;
		else if (CR38 & 0x80)
		    sis_vbflags |= TV_PALN;
	    } else
		sis_vbflags |= TV_NTSC;
	} else if ((sis_device_id == DEVICE_SIS_650_VGA)) {
	    inSISIDXREG(SISCR, 0x79, CR79);
	    if (CR79 & 0x20) {
		sis_vbflags |= TV_PAL;
		if (CR38 & 0x40)
		    sis_vbflags |= TV_PALM;
		else if (CR38 & 0x80)
		    sis_vbflags |= TV_PALN;
	    } else
		sis_vbflags |= TV_NTSC;
	} else {		/* 315, 330 */
	    if (SR38 & 0x01) {
		sis_vbflags |= TV_PAL;
		if (CR38 & 0x40)
		    sis_vbflags |= TV_PALM;
		else if (CR38 & 0x80)
		    sis_vbflags |= TV_PALN;
	    } else
		sis_vbflags |= TV_NTSC;
	}
    }

    if (sis_vbflags &
	(TV_SCART | TV_SVIDEO | TV_AVIDEO | TV_HIVISION | TV_CHSCART |
	 TV_CHHDTV)) {
	if (sis_verbose > 0) {
	    printf("[SiS] %sTV standard %s\n",
		   (sis_vbflags & (TV_CHSCART | TV_CHHDTV)) ? "Using " :
		   "Detected default ",
		   (sis_vbflags & TV_NTSC) ? ((sis_vbflags & TV_CHHDTV) ?
					      "480i HDTV" : "NTSC")
		   : ((sis_vbflags & TV_PALM) ? "PALM"
		      : ((sis_vbflags & TV_PALN) ? "PALN" : "PAL")));
	}
    }

}


static void sis_detect_crt2(void)
{
    unsigned char CR32;

    if (!(sis_vbflags & VB_VIDEOBRIDGE))
	return;

    /* CRT2-VGA not supported on LVDS and 30xLV */
    if (sis_vbflags & (VB_LVDS | VB_301LV | VB_302LV))
	return;

    inSISIDXREG(SISCR, 0x32, CR32);

    if (CR32 & 0x10)
	sis_vbflags |= CRT2_VGA;
}


/* Preinit: detect video bridge and sense connected devs */
static void sis_detect_video_bridge(void)
{
    int temp, temp1, temp2;


    sis_vbflags = 0;

    if (sis_vga_engine != SIS_300_VGA && sis_vga_engine != SIS_315_VGA)
	return;

    inSISIDXREG(SISPART4, 0x00, temp);
    temp &= 0x0F;
    if (temp == 1) {
	inSISIDXREG(SISPART4, 0x01, temp1);
	temp1 &= 0xff;
	if (temp1 >= 0xE0) {
	    sis_vbflags |= VB_302LV;
	    //pSiS->sishw_ext.ujVBChipID = VB_CHIP_302LV;
	    if (sis_verbose > 1) {
		printf
		    ("[SiS] Detected SiS302LV video bridge (ID 1; Revision 0x%x)\n",
		     temp1);
	    }

	} else if (temp1 >= 0xD0) {
	    sis_vbflags |= VB_301LV;
	    //pSiS->sishw_ext.ujVBChipID = VB_CHIP_301LV;
	    if (sis_verbose > 1) {
		printf
		    ("[SiS] Detected SiS301LV video bridge (ID 1; Revision 0x%x)\n",
		     temp1);
	    }
	} else if (temp1 >= 0xB0) {
	    sis_vbflags |= VB_301B;
	    //pSiS->sishw_ext.ujVBChipID = VB_CHIP_301B;
	    inSISIDXREG(SISPART4, 0x23, temp2);
	    if (!(temp2 & 0x02))
		sis_vbflags |= VB_30xBDH;
	    if (sis_verbose > 1) {
		printf
		    ("[SiS] Detected SiS301B%s video bridge (Revision 0x%x)\n",
		     (temp2 & 0x02) ? "" : " (DH)", temp1);
	    }
	} else {
	    sis_vbflags |= VB_301;
	    //pSiS->sishw_ext.ujVBChipID = VB_CHIP_301;
	    if (sis_verbose > 1) {
		printf
		    ("[SiS] Detected SiS301 video bridge (Revision 0x%x)\n",
		     temp1);
	    }
	}

	sis_sense_30x();

    } else if (temp == 2) {

	inSISIDXREG(SISPART4, 0x01, temp1);
	temp1 &= 0xff;
	if (temp1 >= 0xE0) {
	    sis_vbflags |= VB_302LV;
	    //pSiS->sishw_ext.ujVBChipID = VB_CHIP_302LV;
	    if (sis_verbose > 1) {
		printf
		    ("[SiS] Detected SiS302LV video bridge (ID 2; Revision 0x%x)\n",
		     temp1);
	    }
	} else if (temp1 >= 0xD0) {
	    sis_vbflags |= VB_301LV;
	    //pSiS->sishw_ext.ujVBChipID = VB_CHIP_301LV;
	    if (sis_verbose > 1) {
		printf
		    ("[SiS] Detected SiS301LV video bridge (ID 2; Revision 0x%x)\n",
		     temp1);
	    }
	} else {
	    sis_vbflags |= VB_302B;
	    //pSiS->sishw_ext.ujVBChipID = VB_CHIP_302B;
	    inSISIDXREG(SISPART4, 0x23, temp2);
	    if (!(temp & 0x02))
		sis_vbflags |= VB_30xBDH;
	    if (sis_verbose > 1) {
		printf
		    ("[SiS] Detected SiS302B%s video bridge (Revision 0x%x)\n",
		     (temp2 & 0x02) ? "" : " (DH)", temp1);
	    }
	}

	sis_sense_30x();

    } else if (temp == 3) {
	if (sis_verbose > 1) {
	    printf("[SiS] Detected SiS303 video bridge - not supported\n");
	}
    } else {
	/* big scary mess of code to handle unknown or Chrontel LVDS */
	/* skipping it for now */
	if (sis_verbose > 1) {
	    printf
		("[SiS] Detected Chrontel video bridge - not supported\n");
	}
    }

    /* this is probably not relevant to video overlay driver... */
    /* detects if brdige uses LCDA for low res text modes */
    if (sis_vga_engine == SIS_315_VGA) {
	if (sis_vbflags & (VB_302B | VB_301LV | VB_302LV)) {
		inSISIDXREG(SISCR, 0x34, temp);
		if (temp <= 0x13) {
		    inSISIDXREG(SISCR, 0x38, temp);
		    if ((temp & 0x03) == 0x03) {
			//pSiS->SiS_Pr->SiS_UseLCDA = TRUE;
			sis_vbflags |= VB_USELCDA;
		    } else {
			inSISIDXREG(SISCR, 0x30, temp);
			if (temp & 0x20) {
			    inSISIDXREG(SISPART1, 0x13, temp);
			    if (temp & 0x40) {
				//pSiS->SiS_Pr->SiS_UseLCDA = TRUE;
				sis_vbflags |= VB_USELCDA;
			    }
			}
		    }
		}
	    if (sis_vbflags & VB_USELCDA) {
		/* printf("Bridge uses LCDA for low resolution and text modes\n"); */
	    }
	}
    }


}


/* detect video bridge type and sense connected devices */
void sis_init_video_bridge(void)
{

    sis_detect_video_bridge();

    sis_detect_crt1();
    //sis_detect_lcd();
    sis_detect_tv();
    sis_detect_crt2();

    sis_detected_crt2_devices =
	sis_vbflags & (CRT2_LCD | CRT2_TV | CRT2_VGA);

    // force crt2 type
    if (sis_force_crt2_type == CRT2_DEFAULT) {
	if (sis_vbflags & CRT2_VGA)
	    sis_force_crt2_type = CRT2_VGA;
	else if (sis_vbflags & CRT2_LCD)
	    sis_force_crt2_type = CRT2_LCD;
	else if (sis_vbflags & CRT2_TV)
	    sis_force_crt2_type = CRT2_TV;
    }

    switch (sis_force_crt2_type) {
    case CRT2_TV:
	sis_vbflags = sis_vbflags & ~(CRT2_LCD | CRT2_VGA);
	if (sis_vbflags & VB_VIDEOBRIDGE)
	    sis_vbflags = sis_vbflags | CRT2_TV;
	else
	    sis_vbflags = sis_vbflags & ~(CRT2_TV);
	break;
    case CRT2_LCD:
	sis_vbflags = sis_vbflags & ~(CRT2_TV | CRT2_VGA);
	if ((sis_vbflags & VB_VIDEOBRIDGE) /* XXX: && (pSiS->VBLCDFlags) */
	    )
	    sis_vbflags = sis_vbflags | CRT2_LCD;
	else {
	    sis_vbflags = sis_vbflags & ~(CRT2_LCD);
	    if (sis_verbose > 0) {
		printf
		    ("[SiS] Can't force CRT2 to LCD, no panel detected\n");
	    }
	}
	break;
    case CRT2_VGA:
	if (sis_vbflags & VB_LVDS) {
	    if (sis_verbose > 0) {
		printf("[SiS] LVDS does not support secondary VGA\n");
	    }
	    break;
	}
	if (sis_vbflags & (VB_301LV | VB_302LV)) {
	    if (sis_verbose > 0) {
		printf
		    ("[SiS] SiS30xLV bridge does not support secondary VGA\n");
	    }
	    break;
	}
	sis_vbflags = sis_vbflags & ~(CRT2_TV | CRT2_LCD);
	if (sis_vbflags & VB_VIDEOBRIDGE)
	    sis_vbflags = sis_vbflags | CRT2_VGA;
	else
	    sis_vbflags = sis_vbflags & ~(CRT2_VGA);
	break;
    default:
	sis_vbflags &= ~(CRT2_TV | CRT2_LCD | CRT2_VGA);
    }

    /* CRT2 gamma correction?? */

    /* other force modes: */
    /*  have a 'force tv type' (svideo, composite, scart) option? */
    /*  have a 'force crt1 type' (to turn it off, etc??) */

    /* TW: Check if CRT1 used (or needed; this eg. if no CRT2 detected) */
    if (sis_vbflags & VB_VIDEOBRIDGE) {

	/* TW: No CRT2 output? Then we NEED CRT1!
	 *     We also need CRT1 if depth = 8 and bridge=LVDS|630+301B
	 */
	if ((!(sis_vbflags & (CRT2_VGA | CRT2_LCD | CRT2_TV))) || (	/*(pScrn->bitsPerPixel == 8) && */
								      ((sis_vbflags & (VB_LVDS | VB_CHRONTEL)) || ((sis_vga_engine == SIS_300_VGA) && (sis_vbflags & VB_301B))))) {
	    sis_crt1_off = 0;
	}
	/* TW: No CRT2 output? Then we can't use hw overlay on CRT2 */
	if (!(sis_vbflags & (CRT2_VGA | CRT2_LCD | CRT2_TV)))
	    sis_overlay_on_crt1 = 1;

    } else {			/* TW: no video bridge? */

	/* Then we NEED CRT1... */
	sis_crt1_off = 0;
	/* ... and can't use CRT2 for overlay output */
	sis_overlay_on_crt1 = 1;
    }

    /* tvstandard options ? */

    // determine using CRT1 or CRT2?
    /* -> NO dualhead right now... */
    if (sis_vbflags & DISPTYPE_DISP2) {
	if (sis_crt1_off) {
	    sis_vbflags |= VB_DISPMODE_SINGLE;
	    /* TW: No CRT1? Then we use the video overlay on CRT2 */
	    sis_overlay_on_crt1 = 0;
	} else			/* TW: CRT1 and CRT2 - mirror or dual head ----- */
	    sis_vbflags |= (VB_DISPMODE_MIRROR | DISPTYPE_CRT1);
    } else {			/* TW: CRT1 only ------------------------------- */
	sis_vbflags |= (VB_DISPMODE_SINGLE | DISPTYPE_CRT1);
    }

    if (sis_verbose > 0) {
	printf("[SiS] Using hardware overlay on CRT%d\n",
	       sis_overlay_on_crt1 ? 1 : 2);
    }

}