ArmPlatformPkg/Library/HdLcd/HdLcd.c

   1 /** @file
   2
   3   Copyright (c) 2011-2018, 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 /** This file contains all the bits of the Lcd that are
  25   platform independent.
  26 **/
  27
  28 STATIC
  29 UINTN
  30 GetBytesPerPixel (
  31   IN  LCD_BPP       Bpp
  32   )
  33 {
  34   switch (Bpp) {
  35   case LCD_BITS_PER_PIXEL_24:
  36     return 4;
  37
  38   case LCD_BITS_PER_PIXEL_16_565:
  39   case LCD_BITS_PER_PIXEL_16_555:
  40   case LCD_BITS_PER_PIXEL_12_444:
  41     return 2;
  42
  43   case LCD_BITS_PER_PIXEL_8:
  44   case LCD_BITS_PER_PIXEL_4:
  45   case LCD_BITS_PER_PIXEL_2:
  46   case LCD_BITS_PER_PIXEL_1:
  47     return 1;
  48
  49   default:
  50     return 0;
  51   }
  52 }
  53
  54 EFI_STATUS
  55 LcdInitialize (
  56   IN EFI_PHYSICAL_ADDRESS   VramBaseAddress
  57   )
  58 {
  59   // Disable the controller
  60   MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_DISABLE);
  61
  62   // Disable all interrupts
  63   MmioWrite32 (HDLCD_REG_INT_MASK, 0);
  64
  65   // Define start of the VRAM. This never changes for any graphics mode
  66   MmioWrite32 (HDLCD_REG_FB_BASE, (UINT32)VramBaseAddress);
  67
  68   // Setup various registers that never change
  69   MmioWrite32 (HDLCD_REG_BUS_OPTIONS,  (4 << 8) | HDLCD_BURST_8);
  70
  71   MmioWrite32 (HDLCD_REG_POLARITIES, HDLCD_DEFAULT_POLARITIES);
  72
  73   MmioWrite32 (
  74     HDLCD_REG_PIXEL_FORMAT,
  75     HDLCD_LITTLE_ENDIAN | HDLCD_4BYTES_PER_PIXEL
  76     );
  77
  78   MmioWrite32 (HDLCD_REG_RED_SELECT,   (0 << 16 | 8 << 8 | 0));
  79   MmioWrite32 (HDLCD_REG_GREEN_SELECT, (0 << 16 | 8 << 8 | 8));
  80   MmioWrite32 (HDLCD_REG_BLUE_SELECT,  (0 << 16 | 8 << 8 | 16));
  81
  82   return EFI_SUCCESS;
  83 }
  84
  85 EFI_STATUS
  86 LcdSetMode (
  87   IN UINT32  ModeNumber
  88   )
  89 {
  90   EFI_STATUS        Status;
  91   UINT32            HRes;
  92   UINT32            HSync;
  93   UINT32            HBackPorch;
  94   UINT32            HFrontPorch;
  95   UINT32            VRes;
  96   UINT32            VSync;
  97   UINT32            VBackPorch;
  98   UINT32            VFrontPorch;
  99   UINT32            BytesPerPixel;
 100   LCD_BPP           LcdBpp;
 101
 102   // Set the video mode timings and other relevant information
 103   Status = LcdPlatformGetTimings (
 104              ModeNumber,
 105              &HRes,
 106              &HSync,
 107              &HBackPorch,
 108              &HFrontPorch,
 109              &VRes,
 110              &VSync,
 111              &VBackPorch,
 112              &VFrontPorch
 113              );
 114   ASSERT_EFI_ERROR (Status);
 115   if (EFI_ERROR (Status)) {
 116     return EFI_DEVICE_ERROR;
 117   }
 118
 119   Status = LcdPlatformGetBpp (ModeNumber, &LcdBpp);
 120   ASSERT_EFI_ERROR (Status);
 121   if (EFI_ERROR (Status)) {
 122     return EFI_DEVICE_ERROR;
 123   }
 124
 125   BytesPerPixel = GetBytesPerPixel (LcdBpp);
 126
 127   // Disable the controller
 128   MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_DISABLE);
 129
 130   // Update the frame buffer information with the new settings
 131   MmioWrite32 (HDLCD_REG_FB_LINE_LENGTH, HRes * BytesPerPixel);
 132   MmioWrite32 (HDLCD_REG_FB_LINE_PITCH,  HRes * BytesPerPixel);
 133   MmioWrite32 (HDLCD_REG_FB_LINE_COUNT,  VRes - 1);
 134
 135   // Set the vertical timing information
 136   MmioWrite32 (HDLCD_REG_V_SYNC,         VSync);
 137   MmioWrite32 (HDLCD_REG_V_BACK_PORCH,   VBackPorch);
 138   MmioWrite32 (HDLCD_REG_V_DATA,         VRes - 1);
 139   MmioWrite32 (HDLCD_REG_V_FRONT_PORCH,  VFrontPorch);
 140
 141   // Set the horizontal timing information
 142   MmioWrite32 (HDLCD_REG_H_SYNC,         HSync);
 143   MmioWrite32 (HDLCD_REG_H_BACK_PORCH,   HBackPorch);
 144   MmioWrite32 (HDLCD_REG_H_DATA,         HRes - 1);
 145   MmioWrite32 (HDLCD_REG_H_FRONT_PORCH,  HFrontPorch);
 146
 147   // Enable the controller
 148   MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_ENABLE);
 149
 150   return EFI_SUCCESS;
 151 }
 152
 153 VOID
 154 LcdShutdown (
 155   VOID
 156   )
 157 {
 158   // Disable the controller
 159   MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_DISABLE);
 160 }
 161
 162 EFI_STATUS
 163 LcdIdentify (
 164   VOID
 165   )
 166 {
 167   return EFI_SUCCESS;
 168 }