50 lines
1.9 KiB
Ada
50 lines
1.9 KiB
Ada
--
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-- Copyright (C) 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.Registers;
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package body HW.GFX.GMA.PLLs.DPLL_0 is
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DPLL_CTRL1_DPLL0_LINK_RATE_MASK : constant := 7 * 2 ** 1;
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DPLL_CTRL1_DPLL0_LINK_RATE_2700MHZ : constant := 0 * 2 ** 1;
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DPLL_CTRL1_DPLL0_LINK_RATE_1350MHZ : constant := 1 * 2 ** 1;
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DPLL_CTRL1_DPLL0_LINK_RATE_810MHZ : constant := 2 * 2 ** 1;
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DPLL_CTRL1_DPLL0_LINK_RATE_1620MHZ : constant := 3 * 2 ** 1;
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DPLL_CTRL1_DPLL0_LINK_RATE_1080MHZ : constant := 4 * 2 ** 1;
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DPLL_CTRL1_DPLL0_LINK_RATE_2160MHZ : constant := 5 * 2 ** 1;
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DPLL_CTRL1_DPLL0_OVERRIDE : constant := 1 * 2 ** 0;
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procedure Check_Link_Rate
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(Link_Rate : in DP_Bandwidth;
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Success : out Boolean)
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is
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DPLL_Ctrl1 : Word32;
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begin
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Registers.Read (Registers.DPLL_CTRL1, DPLL_Ctrl1);
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case DPLL_Ctrl1 and DPLL_CTRL1_DPLL0_LINK_RATE_MASK is
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when DPLL_CTRL1_DPLL0_LINK_RATE_2700MHZ =>
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Success := Link_Rate = DP_Bandwidth_5_4;
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when DPLL_CTRL1_DPLL0_LINK_RATE_1350MHZ =>
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Success := Link_Rate = DP_Bandwidth_2_7;
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when DPLL_CTRL1_DPLL0_LINK_RATE_810MHZ =>
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Success := Link_Rate = DP_Bandwidth_1_62;
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when others =>
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Success := False;
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end case;
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Success := Success and (DPLL_Ctrl1 and DPLL_CTRL1_DPLL0_OVERRIDE) /= 0;
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end Check_Link_Rate;
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end HW.GFX.GMA.PLLs.DPLL_0;
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