ArmPlatformPkg/Library/HdLcd/HdLcd.c

   1 /** @file  Lcd.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/DebugLib.h>
  16 #include <Library/IoLib.h>
  17 #include <Library/LcdHwLib.h>
  18 #include <Library/LcdPlatformLib.h>
  19 #include <Library/MemoryAllocationLib.h>
  20 #include <Library/PcdLib.h>
  21
  22 #include "HdLcd.h"
  23
  24 /**********************************************************************
  25  *
  26  *  This file contains all the bits of the Lcd that are
  27  *  platform independent.
  28  *
  29  **********************************************************************/
  30
  31 STATIC
  32 UINTN
  33 GetBytesPerPixel (
  34   IN  LCD_BPP       Bpp
  35   )
  36 {
  37   switch(Bpp) {
  38   case LCD_BITS_PER_PIXEL_24:
  39     return 4;
  40
  41   case LCD_BITS_PER_PIXEL_16_565:
  42   case LCD_BITS_PER_PIXEL_16_555:
  43   case LCD_BITS_PER_PIXEL_12_444:
  44     return 2;
  45
  46   case LCD_BITS_PER_PIXEL_8:
  47   case LCD_BITS_PER_PIXEL_4:
  48   case LCD_BITS_PER_PIXEL_2:
  49   case LCD_BITS_PER_PIXEL_1:
  50     return 1;
  51
  52   default:
  53     return 0;
  54   }
  55 }
  56
  57 EFI_STATUS
  58 LcdInitialize (
  59   IN EFI_PHYSICAL_ADDRESS   VramBaseAddress
  60   )
  61 {
  62   // Disable the controller
  63   MmioWrite32(HDLCD_REG_COMMAND, HDLCD_DISABLE);
  64
  65   // Disable all interrupts
  66   MmioWrite32(HDLCD_REG_INT_MASK, 0);
  67
  68   // Define start of the VRAM. This never changes for any graphics mode
  69   MmioWrite32(HDLCD_REG_FB_BASE, (UINT32) VramBaseAddress);
  70
  71   // Setup various registers that never change
  72   MmioWrite32(HDLCD_REG_BUS_OPTIONS,  (4 << 8) | HDLCD_BURST_8);
  73   MmioWrite32(HDLCD_REG_POLARITIES,   HDLCD_PXCLK_LOW | HDLCD_DATA_HIGH | HDLCD_DATEN_HIGH | HDLCD_HSYNC_LOW | HDLCD_VSYNC_HIGH);
  74   MmioWrite32(HDLCD_REG_PIXEL_FORMAT, HDLCD_LITTLE_ENDIAN | HDLCD_4BYTES_PER_PIXEL);
  75   MmioWrite32(HDLCD_REG_RED_SELECT,   (0 << 16 | 8 << 8 |  0));
  76   MmioWrite32(HDLCD_REG_GREEN_SELECT, (0 << 16 | 8 << 8 |  8));
  77   MmioWrite32(HDLCD_REG_BLUE_SELECT,  (0 << 16 | 8 << 8 | 16));
  78
  79   return EFI_SUCCESS;
  80 }
  81
  82 EFI_STATUS
  83 LcdSetMode (
  84   IN UINT32  ModeNumber
  85   )
  86 {
  87   EFI_STATUS        Status;
  88   UINT32            HRes;
  89   UINT32            HSync;
  90   UINT32            HBackPorch;
  91   UINT32            HFrontPorch;
  92   UINT32            VRes;
  93   UINT32            VSync;
  94   UINT32            VBackPorch;
  95   UINT32            VFrontPorch;
  96   UINT32            BytesPerPixel;
  97   LCD_BPP           LcdBpp;
  98
  99
 100   // Set the video mode timings and other relevant information
 101   Status = LcdPlatformGetTimings (ModeNumber,
 102                                   &HRes,&HSync,&HBackPorch,&HFrontPorch,
 103                                   &VRes,&VSync,&VBackPorch,&VFrontPorch);
 104   ASSERT_EFI_ERROR (Status);
 105   if (EFI_ERROR( Status )) {
 106     return EFI_DEVICE_ERROR;
 107   }
 108
 109   Status = LcdPlatformGetBpp (ModeNumber,&LcdBpp);
 110   ASSERT_EFI_ERROR (Status);
 111   if (EFI_ERROR( Status )) {
 112     return EFI_DEVICE_ERROR;
 113   }
 114
 115   BytesPerPixel = GetBytesPerPixel(LcdBpp);
 116
 117   // Disable the controller
 118   MmioWrite32(HDLCD_REG_COMMAND, HDLCD_DISABLE);
 119
 120   // Update the frame buffer information with the new settings
 121   MmioWrite32(HDLCD_REG_FB_LINE_LENGTH, HRes * BytesPerPixel);
 122   MmioWrite32(HDLCD_REG_FB_LINE_PITCH,  HRes * BytesPerPixel);
 123   MmioWrite32(HDLCD_REG_FB_LINE_COUNT,  VRes - 1);
 124
 125   // Set the vertical timing information
 126   MmioWrite32(HDLCD_REG_V_SYNC,         VSync);
 127   MmioWrite32(HDLCD_REG_V_BACK_PORCH,   VBackPorch);
 128   MmioWrite32(HDLCD_REG_V_DATA,         VRes - 1);
 129   MmioWrite32(HDLCD_REG_V_FRONT_PORCH,  VFrontPorch);
 130
 131   // Set the horizontal timing information
 132   MmioWrite32(HDLCD_REG_H_SYNC,         HSync);
 133   MmioWrite32(HDLCD_REG_H_BACK_PORCH,   HBackPorch);
 134   MmioWrite32(HDLCD_REG_H_DATA,         HRes - 1);
 135   MmioWrite32(HDLCD_REG_H_FRONT_PORCH,  HFrontPorch);
 136
 137   // Enable the controller
 138   MmioWrite32(HDLCD_REG_COMMAND, HDLCD_ENABLE);
 139
 140   return EFI_SUCCESS;
 141 }
 142
 143 VOID
 144 LcdShutdown (
 145   VOID
 146   )
 147 {
 148   // Disable the controller
 149   MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_DISABLE);
 150 }
 151
 152 EFI_STATUS
 153 LcdIdentify (
 154   VOID
 155   )
 156 {
 157   return EFI_SUCCESS;
 158 }