79 lines
3.0 KiB
Ada
79 lines
3.0 KiB
Ada
--
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-- Copyright (C) 2015-2016 secunet Security Networks AG
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-- Copyright (C) 2016 Nico Huber <nico.h@gmx.de>
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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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package body HW.GFX.GMA.PCH.LVDS is
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PCH_LVDS_ENABLE : constant := 1 * 2 ** 31;
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PCH_LVDS_VSYNC_POLARITY_INVERT : constant := 1 * 2 ** 21;
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PCH_LVDS_HSYNC_POLARITY_INVERT : constant := 1 * 2 ** 20;
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PCH_LVDS_CLK_A_DATA_A0A2_POWER_MASK : constant := 3 * 2 ** 8;
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PCH_LVDS_CLK_A_DATA_A0A2_POWER_DOWN : constant := 0 * 2 ** 8;
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PCH_LVDS_CLK_A_DATA_A0A2_POWER_UP : constant := 3 * 2 ** 8;
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PCH_LVDS_CLK_B_POWER_MASK : constant := 3 * 2 ** 4;
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PCH_LVDS_CLK_B_POWER_DOWN : constant := 0 * 2 ** 4;
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PCH_LVDS_CLK_B_POWER_UP : constant := 3 * 2 ** 4;
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PCH_LVDS_DATA_B0B2_POWER_MASK : constant := 3 * 2 ** 2;
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PCH_LVDS_DATA_B0B2_POWER_DOWN : constant := 0 * 2 ** 2;
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PCH_LVDS_DATA_B0B2_POWER_UP : constant := 3 * 2 ** 2;
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----------------------------------------------------------------------------
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procedure On (Port_Cfg : Port_Config; FDI_Port : FDI_Port_Type)
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is
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Sync_Polarity : constant Word32 :=
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(if Port_Cfg.Mode.H_Sync_Active_High then 0
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else PCH_LVDS_HSYNC_POLARITY_INVERT) or
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(if Port_Cfg.Mode.V_Sync_Active_High then 0
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else PCH_LVDS_VSYNC_POLARITY_INVERT);
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Two_Channel : constant Word32 :=
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(if Port_Cfg.Mode.Dotclock >= Config.LVDS_Dual_Threshold then
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PCH_LVDS_CLK_B_POWER_UP or PCH_LVDS_DATA_B0B2_POWER_UP else 0);
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begin
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pragma Debug (Debug.Put_Line (GNAT.Source_Info.Enclosing_Entity));
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pragma Debug (Port_Cfg.Mode.BPC /= 6, Debug.Put_Line
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("WARNING: Only 18bpp LVDS mode implemented."));
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Registers.Write
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(Register => Registers.PCH_LVDS,
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Value => PCH_LVDS_ENABLE or
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PCH_TRANSCODER_SELECT (FDI_Port) or
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Sync_Polarity or
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PCH_LVDS_CLK_A_DATA_A0A2_POWER_UP or
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Two_Channel);
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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.Write
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(Register => Registers.PCH_LVDS,
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Value => PCH_LVDS_CLK_A_DATA_A0A2_POWER_DOWN or
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PCH_LVDS_CLK_B_POWER_DOWN or
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PCH_LVDS_DATA_B0B2_POWER_DOWN);
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end Off;
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end HW.GFX.GMA.PCH.LVDS;
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