81 lines
2.4 KiB
Ada
81 lines
2.4 KiB
Ada
--
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-- Copyright (C) 2015-2016 secunet Security Networks AG
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 2 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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with HW.GFX.GMA.Config;
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with HW.GFX.GMA.Registers;
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with HW.Debug;
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with GNAT.Source_Info;
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use type HW.Word64;
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package body HW.GFX.GMA.GMCH.VGA is
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ADPA_DAC_ENABLE : constant := 1 * 2 ** 31;
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ADPA_USE_VGA_HVPOLARITY : constant := 1 * 2 ** 15;
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ADPA_VSYNC_DISABLE : constant := 1 * 2 ** 11;
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ADPA_HSYNC_DISABLE : constant := 1 * 2 ** 10;
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ADPA_VSYNC_ACTIVE_HIGH : constant := 1 * 2 ** 4;
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ADPA_HSYNC_ACTIVE_HIGH : constant := 1 * 2 ** 3;
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ADPA_MASK : constant Word32 :=
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GMCH_PORT_PIPE_SELECT_MASK or
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ADPA_DAC_ENABLE or
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ADPA_VSYNC_DISABLE or
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ADPA_HSYNC_DISABLE or
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ADPA_VSYNC_ACTIVE_HIGH or
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ADPA_HSYNC_ACTIVE_HIGH or
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ADPA_USE_VGA_HVPOLARITY;
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----------------------------------------------------------------------------
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procedure On
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(Pipe : Pipe_Index;
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Mode : in Mode_Type)
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is
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Polarity : Word32 := 0;
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begin
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pragma Debug (Debug.Put_Line (GNAT.Source_Info.Enclosing_Entity));
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if Mode.H_Sync_Active_High then
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Polarity := Polarity or ADPA_HSYNC_ACTIVE_HIGH;
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end if;
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if Mode.V_Sync_Active_High then
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Polarity := Polarity or ADPA_VSYNC_ACTIVE_HIGH;
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end if;
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Registers.Unset_And_Set_Mask
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(Register => Registers.GMCH_ADPA,
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Mask_Unset => ADPA_MASK,
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Mask_Set => ADPA_DAC_ENABLE or
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GMCH_PORT_PIPE_SELECT (Pipe) or
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Polarity);
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end On;
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----------------------------------------------------------------------------
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procedure Off
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is
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begin
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pragma Debug (Debug.Put_Line (GNAT.Source_Info.Enclosing_Entity));
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Registers.Unset_And_Set_Mask
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(Register => Registers.GMCH_ADPA,
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Mask_Unset => ADPA_DAC_ENABLE,
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Mask_Set => ADPA_HSYNC_DISABLE or
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ADPA_VSYNC_DISABLE);
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end Off;
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end HW.GFX.GMA.GMCH.VGA;
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