ArmPlatformPkg/Drivers/LcdGraphicsOutputDxe/PL111Lcd.c

   1 /** @file  PL111Lcd.c
   2
   3   Copyright (c) 2011-2012, ARM Ltd. All rights reserved.<BR>
   4
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <Library/IoLib.h>
  16 #include <Library/MemoryAllocationLib.h>
  17
  18 #include <Drivers/PL111Lcd.h>
  19
  20 #include "LcdGraphicsOutputDxe.h"
  21
  22 /**********************************************************************
  23  *
  24  *  This file contains all the bits of the PL111 that are
  25  *  platform independent.
  26  *
  27  **********************************************************************/
  28
  29 EFI_STATUS
  30 LcdInitialize (
  31   IN EFI_PHYSICAL_ADDRESS   VramBaseAddress
  32   )
  33 {
  34   // Define start of the VRAM. This never changes for any graphics mode
  35   MmioWrite32(PL111_REG_LCD_UP_BASE, (UINT32) VramBaseAddress);
  36   MmioWrite32(PL111_REG_LCD_LP_BASE, 0); // We are not using a double buffer
  37
  38   // Disable all interrupts from the PL111
  39   MmioWrite32(PL111_REG_LCD_IMSC, 0);
  40
  41   return EFI_SUCCESS;
  42 }
  43
  44 EFI_STATUS
  45 LcdSetMode (
  46   IN UINT32  ModeNumber
  47   )
  48 {
  49   EFI_STATUS        Status;
  50   UINT32            HRes;
  51   UINT32            HSync;
  52   UINT32            HBackPorch;
  53   UINT32            HFrontPorch;
  54   UINT32            VRes;
  55   UINT32            VSync;
  56   UINT32            VBackPorch;
  57   UINT32            VFrontPorch;
  58   UINT32            LcdControl;
  59   LCD_BPP           LcdBpp;
  60
  61   // Set the video mode timings and other relevant information
  62   Status = LcdPlatformGetTimings (ModeNumber,
  63                                   &HRes,&HSync,&HBackPorch,&HFrontPorch,
  64                                   &VRes,&VSync,&VBackPorch,&VFrontPorch);
  65   ASSERT_EFI_ERROR (Status);
  66   if (EFI_ERROR( Status )) {
  67     return EFI_DEVICE_ERROR;
  68   }
  69
  70   Status = LcdPlatformGetBpp (ModeNumber,&LcdBpp);
  71   ASSERT_EFI_ERROR (Status);
  72   if (EFI_ERROR( Status )) {
  73     return EFI_DEVICE_ERROR;
  74   }
  75
  76   // Disable the CLCD_LcdEn bit
  77   LcdControl = MmioRead32( PL111_REG_LCD_CONTROL);
  78   MmioWrite32(PL111_REG_LCD_CONTROL,  LcdControl & ~1);
  79
  80   // Set Timings
  81   MmioWrite32 (PL111_REG_LCD_TIMING_0, HOR_AXIS_PANEL(HBackPorch, HFrontPorch, HSync, HRes));
  82   MmioWrite32 (PL111_REG_LCD_TIMING_1, VER_AXIS_PANEL(VBackPorch, VFrontPorch, VSync, VRes));
  83   MmioWrite32 (PL111_REG_LCD_TIMING_2, CLK_SIG_POLARITY(HRes));
  84   MmioWrite32 (PL111_REG_LCD_TIMING_3, 0);
  85
  86   // PL111_REG_LCD_CONTROL
  87   LcdControl = PL111_CTRL_LCD_EN | PL111_CTRL_LCD_BPP(LcdBpp) | PL111_CTRL_LCD_TFT | PL111_CTRL_BGR;
  88   MmioWrite32(PL111_REG_LCD_CONTROL,  LcdControl);
  89
  90   // Turn on power to the LCD Panel
  91   LcdControl |= PL111_CTRL_LCD_PWR;
  92   MmioWrite32(PL111_REG_LCD_CONTROL,  LcdControl);
  93
  94   return EFI_SUCCESS;
  95 }
  96
  97 VOID
  98 LcdShutdown (
  99   VOID
 100   )
 101 {
 102   // Disable the controller
 103   MmioAnd32 (PL111_REG_LCD_CONTROL, ~PL111_CTRL_LCD_EN);
 104 }