mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-02 13:03:28 +01:00
175 lines
4.6 KiB
C
175 lines
4.6 KiB
C
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/** @file
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This file contains the platform independent parts of HdLcd
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Copyright (c) 2011-2018, ARM Ltd. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/DebugLib.h>
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#include <Library/IoLib.h>
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#include <Library/LcdHwLib.h>
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#include <Library/LcdPlatformLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/PcdLib.h>
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#include "HdLcd.h"
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#define BYTES_PER_PIXEL 4
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/** Initialize display.
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@param[in] VramBaseAddress Address of the framebuffer.
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@retval EFI_SUCCESS Display initialization successful.
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**/
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EFI_STATUS
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LcdInitialize (
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IN EFI_PHYSICAL_ADDRESS VramBaseAddress
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)
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{
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// Disable the controller
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MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_DISABLE);
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// Disable all interrupts
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MmioWrite32 (HDLCD_REG_INT_MASK, 0);
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// Define start of the VRAM. This never changes for any graphics mode
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MmioWrite32 (HDLCD_REG_FB_BASE, (UINT32)VramBaseAddress);
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// Setup various registers that never change
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MmioWrite32 (HDLCD_REG_BUS_OPTIONS, (4 << 8) | HDLCD_BURST_8);
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MmioWrite32 (HDLCD_REG_POLARITIES, HDLCD_DEFAULT_POLARITIES);
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MmioWrite32 (
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HDLCD_REG_PIXEL_FORMAT,
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HDLCD_LITTLE_ENDIAN | HDLCD_4BYTES_PER_PIXEL
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);
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return EFI_SUCCESS;
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}
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/** Set requested mode of the display.
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@param[in] ModeNumber Display mode number.
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@retval EFI_SUCCESS Display mode set successfully.
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@retval !(EFI_SUCCESS) Other errors.
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**/
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EFI_STATUS
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LcdSetMode (
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IN UINT32 ModeNumber
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)
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{
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EFI_STATUS Status;
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SCAN_TIMINGS *Horizontal;
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SCAN_TIMINGS *Vertical;
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EFI_GRAPHICS_PIXEL_FORMAT PixelFormat;
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EFI_GRAPHICS_OUTPUT_MODE_INFORMATION ModeInfo;
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// Set the video mode timings and other relevant information
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Status = LcdPlatformGetTimings (
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ModeNumber,
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&Horizontal,
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&Vertical
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);
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if (EFI_ERROR (Status)) {
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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ASSERT (Horizontal != NULL);
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ASSERT (Vertical != NULL);
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// Get the pixel format information.
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Status = LcdPlatformQueryMode (ModeNumber, &ModeInfo);
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if (EFI_ERROR (Status)) {
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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// By default PcdArmHdLcdSwapBlueRedSelect is set to false
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// However on the Juno platform HW lines for BLUE and RED are swapped
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// Therefore PcdArmHdLcdSwapBlueRedSelect is set to TRUE for the Juno platform
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PixelFormat = FixedPcdGetBool (PcdArmHdLcdSwapBlueRedSelect)
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? PixelRedGreenBlueReserved8BitPerColor
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: PixelBlueGreenRedReserved8BitPerColor;
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if (ModeInfo.PixelFormat == PixelFormat) {
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MmioWrite32 (HDLCD_REG_RED_SELECT, (8 << 8) | 16);
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MmioWrite32 (HDLCD_REG_BLUE_SELECT, (8 << 8) | 0);
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} else {
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MmioWrite32 (HDLCD_REG_BLUE_SELECT, (8 << 8) | 16);
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MmioWrite32 (HDLCD_REG_RED_SELECT, (8 << 8) | 0);
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}
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MmioWrite32 (HDLCD_REG_GREEN_SELECT, (8 << 8) | 8);
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// Disable the controller
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MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_DISABLE);
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// Update the frame buffer information with the new settings
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MmioWrite32 (
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HDLCD_REG_FB_LINE_LENGTH,
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Horizontal->Resolution * BYTES_PER_PIXEL
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);
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MmioWrite32 (
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HDLCD_REG_FB_LINE_PITCH,
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Horizontal->Resolution * BYTES_PER_PIXEL
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);
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MmioWrite32 (HDLCD_REG_FB_LINE_COUNT, Vertical->Resolution - 1);
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// Set the vertical timing information
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MmioWrite32 (HDLCD_REG_V_SYNC, Vertical->Sync);
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MmioWrite32 (HDLCD_REG_V_BACK_PORCH, Vertical->BackPorch);
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MmioWrite32 (HDLCD_REG_V_DATA, Vertical->Resolution - 1);
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MmioWrite32 (HDLCD_REG_V_FRONT_PORCH, Vertical->FrontPorch);
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// Set the horizontal timing information
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MmioWrite32 (HDLCD_REG_H_SYNC, Horizontal->Sync);
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MmioWrite32 (HDLCD_REG_H_BACK_PORCH, Horizontal->BackPorch);
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MmioWrite32 (HDLCD_REG_H_DATA, Horizontal->Resolution - 1);
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MmioWrite32 (HDLCD_REG_H_FRONT_PORCH, Horizontal->FrontPorch);
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// Enable the controller
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MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_ENABLE);
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return EFI_SUCCESS;
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}
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/** De-initializes the display.
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**/
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VOID
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LcdShutdown (
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VOID
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)
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{
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// Disable the controller
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MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_DISABLE);
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}
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/** Check for presence of HDLCD.
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@retval EFI_SUCCESS Returns success if platform implements a HDLCD
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controller.
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@retval EFI_NOT_FOUND HDLCD display controller not found on the
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platform.
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**/
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EFI_STATUS
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LcdIdentify (
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VOID
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)
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{
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if ((MmioRead32 (HDLCD_REG_VERSION) >> 16) == HDLCD_PRODUCT_ID) {
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return EFI_SUCCESS;
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}
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return EFI_NOT_FOUND;
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}
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