ArmPlatformPkg/Drivers/LcdGraphicsOutputDxe/PL111Lcd.c

   1 /** @file  PL111Lcd.c
   2
   3   Copyright (c) 2011, ARM Ltd. All rights reserved.<BR>
   4   This program and the accompanying materials
   5   are licensed and made available under the terms and conditions of the BSD License
   6   which accompanies this distribution.  The full text of the license may be found at
   7   http://opensource.org/licenses/bsd-license.php
   8
   9   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 **/
  13
  14 #include <Library/IoLib.h>
  15 #include <Library/MemoryAllocationLib.h>
  16
  17 #include <Drivers/PL111Lcd.h>
  18
  19 #include "LcdGraphicsOutputDxe.h"
  20
  21 /**********************************************************************
  22  *
  23  *  This file contains all the bits of the PL111 that are
  24  *  platform independent.
  25  *
  26  **********************************************************************/
  27
  28 EFI_STATUS
  29 PL111Indentify (
  30   VOID
  31   )
  32 {
  33   // Check if this is a PrimeCell Peripheral
  34   if (    ( MmioRead8( PL111_REG_CLCD_P_CELL_ID_0 ) != 0x0D )
  35        || ( MmioRead8( PL111_REG_CLCD_P_CELL_ID_1 ) != 0xF0 )
  36        || ( MmioRead8( PL111_REG_CLCD_P_CELL_ID_2 ) != 0x05 )
  37        || ( MmioRead8( PL111_REG_CLCD_P_CELL_ID_3 ) != 0xB1 ) ) {
  38     return EFI_NOT_FOUND;
  39   }
  40
  41   // Check if this PrimeCell Peripheral is the PL111 LCD
  42   if (    ( MmioRead8( PL111_REG_CLCD_PERIPH_ID_0 ) != 0x11 )
  43        || ( MmioRead8( PL111_REG_CLCD_PERIPH_ID_1 ) != 0x11 )
  44        || ( (MmioRead8( PL111_REG_CLCD_PERIPH_ID_2 ) & 0xF) != 0x04 )
  45        || ( MmioRead8( PL111_REG_CLCD_PERIPH_ID_3 ) != 0x00 ) ) {
  46     return EFI_NOT_FOUND;
  47   }
  48
  49   return EFI_SUCCESS;
  50 }
  51
  52 EFI_STATUS
  53 LcdInitialize (
  54   IN EFI_PHYSICAL_ADDRESS   VramBaseAddress
  55   )
  56 {
  57   EFI_STATUS  Status = EFI_SUCCESS;
  58
  59   // Check if the PL111 is fitted on this motherboard
  60   Status = PL111Indentify ();
  61   if (EFI_ERROR( Status )) {
  62     return EFI_DEVICE_ERROR;
  63   }
  64
  65   // Define start of the VRAM. This never changes for any graphics mode
  66   MmioWrite32(PL111_REG_LCD_UP_BASE, (UINT32) VramBaseAddress);
  67   MmioWrite32(PL111_REG_LCD_LP_BASE, 0); // We are not using a double buffer
  68
  69   // Disable all interrupts from the PL111
  70   MmioWrite32(PL111_REG_LCD_IMSC, 0);
  71
  72   return EFI_SUCCESS;
  73 }
  74
  75 EFI_STATUS
  76 LcdSetMode (
  77   IN UINT32  ModeNumber
  78   )
  79 {
  80   EFI_STATUS        Status;
  81   UINT32            HRes;
  82   UINT32            HSync;
  83   UINT32            HBackPorch;
  84   UINT32            HFrontPorch;
  85   UINT32            VRes;
  86   UINT32            VSync;
  87   UINT32            VBackPorch;
  88   UINT32            VFrontPorch;
  89   UINT32            LcdControl;
  90   LCD_BPP           LcdBpp;
  91
  92   // Set the video mode timings and other relevant information
  93   Status = LcdPlatformGetTimings (ModeNumber,
  94                                   &HRes,&HSync,&HBackPorch,&HFrontPorch,
  95                                   &VRes,&VSync,&VBackPorch,&VFrontPorch);
  96   ASSERT_EFI_ERROR (Status);
  97   if (EFI_ERROR( Status )) {
  98     return EFI_DEVICE_ERROR;
  99   }
 100
 101   Status = LcdPlatformGetBpp (ModeNumber,&LcdBpp);
 102   ASSERT_EFI_ERROR (Status);
 103   if (EFI_ERROR( Status )) {
 104     return EFI_DEVICE_ERROR;
 105   }
 106
 107   // Disable the CLCD_LcdEn bit
 108   LcdControl = MmioRead32( PL111_REG_LCD_CONTROL);
 109   MmioWrite32(PL111_REG_LCD_CONTROL,  LcdControl & ~1);
 110
 111   // Set Timings
 112   MmioWrite32 (PL111_REG_LCD_TIMING_0, HOR_AXIS_PANEL(HBackPorch, HFrontPorch, HSync, HRes));
 113   MmioWrite32 (PL111_REG_LCD_TIMING_1, VER_AXIS_PANEL(VBackPorch, VFrontPorch, VSync, VRes));
 114   MmioWrite32 (PL111_REG_LCD_TIMING_2, CLK_SIG_POLARITY(HRes));
 115   MmioWrite32 (PL111_REG_LCD_TIMING_3, 0);
 116
 117   // PL111_REG_LCD_CONTROL
 118   LcdControl = PL111_CTRL_LCD_EN | PL111_CTRL_LCD_BPP(LcdBpp) | PL111_CTRL_LCD_TFT | PL111_CTRL_BGR;
 119   MmioWrite32(PL111_REG_LCD_CONTROL,  LcdControl);
 120
 121   // Turn on power to the LCD Panel
 122   LcdControl |= PL111_CTRL_LCD_PWR;
 123   MmioWrite32(PL111_REG_LCD_CONTROL,  LcdControl);
 124
 125   return EFI_SUCCESS;
 126 }
 127
 128 VOID
 129 LcdShutdown (
 130   VOID
 131   )
 132 {
 133   // Nothing to do in terms of hardware.
 134   // We could switch off the monitor display if required
 135
 136   //TODO: ImplementMe
 137 }