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 LcdIdentify (
  31   VOID
  32   )
  33 {
  34   DEBUG ((EFI_D_WARN, "Probing ID registers at 0x%lx for a PL111\n",
  35     PL111_REG_CLCD_PERIPH_ID_0));
  36
  37   // Check if this is a PL111
  38   if (MmioRead8 (PL111_REG_CLCD_PERIPH_ID_0) == PL111_CLCD_PERIPH_ID_0 &&
  39       MmioRead8 (PL111_REG_CLCD_PERIPH_ID_1) == PL111_CLCD_PERIPH_ID_1 &&
  40      (MmioRead8 (PL111_REG_CLCD_PERIPH_ID_2) & 0xf) == PL111_CLCD_PERIPH_ID_2 &&
  41       MmioRead8 (PL111_REG_CLCD_PERIPH_ID_3) == PL111_CLCD_PERIPH_ID_3 &&
  42       MmioRead8 (PL111_REG_CLCD_P_CELL_ID_0) == PL111_CLCD_P_CELL_ID_0 &&
  43       MmioRead8 (PL111_REG_CLCD_P_CELL_ID_1) == PL111_CLCD_P_CELL_ID_1 &&
  44       MmioRead8 (PL111_REG_CLCD_P_CELL_ID_2) == PL111_CLCD_P_CELL_ID_2 &&
  45       MmioRead8 (PL111_REG_CLCD_P_CELL_ID_3) == PL111_CLCD_P_CELL_ID_3) {
  46     return EFI_SUCCESS;
  47   }
  48   return EFI_NOT_FOUND;
  49 }
  50
  51 EFI_STATUS
  52 LcdInitialize (
  53   IN EFI_PHYSICAL_ADDRESS   VramBaseAddress
  54   )
  55 {
  56   // Define start of the VRAM. This never changes for any graphics mode
  57   MmioWrite32(PL111_REG_LCD_UP_BASE, (UINT32) VramBaseAddress);
  58   MmioWrite32(PL111_REG_LCD_LP_BASE, 0); // We are not using a double buffer
  59
  60   // Disable all interrupts from the PL111
  61   MmioWrite32(PL111_REG_LCD_IMSC, 0);
  62
  63   return EFI_SUCCESS;
  64 }
  65
  66 EFI_STATUS
  67 LcdSetMode (
  68   IN UINT32  ModeNumber
  69   )
  70 {
  71   EFI_STATUS        Status;
  72   UINT32            HRes;
  73   UINT32            HSync;
  74   UINT32            HBackPorch;
  75   UINT32            HFrontPorch;
  76   UINT32            VRes;
  77   UINT32            VSync;
  78   UINT32            VBackPorch;
  79   UINT32            VFrontPorch;
  80   UINT32            LcdControl;
  81   LCD_BPP           LcdBpp;
  82
  83   // Set the video mode timings and other relevant information
  84   Status = LcdPlatformGetTimings (ModeNumber,
  85                                   &HRes,&HSync,&HBackPorch,&HFrontPorch,
  86                                   &VRes,&VSync,&VBackPorch,&VFrontPorch);
  87   ASSERT_EFI_ERROR (Status);
  88   if (EFI_ERROR( Status )) {
  89     return EFI_DEVICE_ERROR;
  90   }
  91
  92   Status = LcdPlatformGetBpp (ModeNumber,&LcdBpp);
  93   ASSERT_EFI_ERROR (Status);
  94   if (EFI_ERROR( Status )) {
  95     return EFI_DEVICE_ERROR;
  96   }
  97
  98   // Disable the CLCD_LcdEn bit
  99   LcdControl = MmioRead32( PL111_REG_LCD_CONTROL);
 100   MmioWrite32(PL111_REG_LCD_CONTROL,  LcdControl & ~1);
 101
 102   // Set Timings
 103   MmioWrite32 (PL111_REG_LCD_TIMING_0, HOR_AXIS_PANEL(HBackPorch, HFrontPorch, HSync, HRes));
 104   MmioWrite32 (PL111_REG_LCD_TIMING_1, VER_AXIS_PANEL(VBackPorch, VFrontPorch, VSync, VRes));
 105   MmioWrite32 (PL111_REG_LCD_TIMING_2, CLK_SIG_POLARITY(HRes));
 106   MmioWrite32 (PL111_REG_LCD_TIMING_3, 0);
 107
 108   // PL111_REG_LCD_CONTROL
 109   LcdControl = PL111_CTRL_LCD_EN | PL111_CTRL_LCD_BPP(LcdBpp) | PL111_CTRL_LCD_TFT | PL111_CTRL_BGR;
 110   MmioWrite32(PL111_REG_LCD_CONTROL,  LcdControl);
 111
 112   // Turn on power to the LCD Panel
 113   LcdControl |= PL111_CTRL_LCD_PWR;
 114   MmioWrite32(PL111_REG_LCD_CONTROL,  LcdControl);
 115
 116   return EFI_SUCCESS;
 117 }
 118
 119 VOID
 120 LcdShutdown (
 121   VOID
 122   )
 123 {
 124   // Disable the controller
 125   MmioAnd32 (PL111_REG_LCD_CONTROL, ~PL111_CTRL_LCD_EN);
 126 }