| -- |
| -- Copyright (C) 2016 secunet Security Networks AG |
| -- |
| -- This program is free software; you can redistribute it and/or modify |
| -- it under the terms of the GNU General Public License as published by |
| -- the Free Software Foundation; either version 2 of the License, or |
| -- (at your option) any later version. |
| -- |
| -- This program is distributed in the hope that it will be useful, |
| -- but WITHOUT ANY WARRANTY; without even the implied warranty of |
| -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| -- GNU General Public License for more details. |
| -- |
| |
| with HW.GFX.GMA.Registers; |
| |
| package body HW.GFX.GMA.PLLs.DPLL_0 is |
| |
| DPLL_CTRL1_DPLL0_LINK_RATE_MASK : constant := 7 * 2 ** 1; |
| DPLL_CTRL1_DPLL0_LINK_RATE_2700MHZ : constant := 0 * 2 ** 1; |
| DPLL_CTRL1_DPLL0_LINK_RATE_1350MHZ : constant := 1 * 2 ** 1; |
| DPLL_CTRL1_DPLL0_LINK_RATE_810MHZ : constant := 2 * 2 ** 1; |
| DPLL_CTRL1_DPLL0_LINK_RATE_1620MHZ : constant := 3 * 2 ** 1; |
| DPLL_CTRL1_DPLL0_LINK_RATE_1080MHZ : constant := 4 * 2 ** 1; |
| DPLL_CTRL1_DPLL0_LINK_RATE_2160MHZ : constant := 5 * 2 ** 1; |
| DPLL_CTRL1_DPLL0_OVERRIDE : constant := 1 * 2 ** 0; |
| |
| procedure Check_Link_Rate |
| (Link_Rate : in DP_Bandwidth; |
| Success : out Boolean) |
| is |
| DPLL_Ctrl1 : Word32; |
| begin |
| Registers.Read (Registers.DPLL_CTRL1, DPLL_Ctrl1); |
| |
| case DPLL_Ctrl1 and DPLL_CTRL1_DPLL0_LINK_RATE_MASK is |
| when DPLL_CTRL1_DPLL0_LINK_RATE_2700MHZ => |
| Success := Link_Rate = DP_Bandwidth_5_4; |
| when DPLL_CTRL1_DPLL0_LINK_RATE_1350MHZ => |
| Success := Link_Rate = DP_Bandwidth_2_7; |
| when DPLL_CTRL1_DPLL0_LINK_RATE_810MHZ => |
| Success := Link_Rate = DP_Bandwidth_1_62; |
| when others => |
| Success := False; |
| end case; |
| Success := Success and (DPLL_Ctrl1 and DPLL_CTRL1_DPLL0_OVERRIDE) /= 0; |
| end Check_Link_Rate; |
| |
| end HW.GFX.GMA.PLLs.DPLL_0; |