diff options
Diffstat (limited to 'ArmPlatformPkg/Drivers/LcdGraphicsOutputDxe/HdLcd.c')
-rw-r--r-- | ArmPlatformPkg/Drivers/LcdGraphicsOutputDxe/HdLcd.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/ArmPlatformPkg/Drivers/LcdGraphicsOutputDxe/HdLcd.c b/ArmPlatformPkg/Drivers/LcdGraphicsOutputDxe/HdLcd.c new file mode 100644 index 0000000000..c9baa98224 --- /dev/null +++ b/ArmPlatformPkg/Drivers/LcdGraphicsOutputDxe/HdLcd.c @@ -0,0 +1,125 @@ +/** @file Lcd.c
+
+ Copyright (c) 2011-2012, ARM Ltd. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/LcdPlatformLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+
+#include <Drivers/HdLcd.h>
+
+#include "LcdGraphicsOutputDxe.h"
+
+/**********************************************************************
+ *
+ * This file contains all the bits of the Lcd that are
+ * platform independent.
+ *
+ **********************************************************************/
+
+EFI_STATUS
+LcdInitialize (
+ IN EFI_PHYSICAL_ADDRESS VramBaseAddress
+ )
+{
+ // Disable the controller
+ MmioWrite32(HDLCD_REG_COMMAND, HDLCD_DISABLE);
+
+ // Disable all interrupts
+ MmioWrite32(HDLCD_REG_INT_MASK, 0);
+
+ // Define start of the VRAM. This never changes for any graphics mode
+ MmioWrite32(HDLCD_REG_FB_BASE, (UINT32) VramBaseAddress);
+
+ // Setup various registers that never change
+ MmioWrite32(HDLCD_REG_BUS_OPTIONS, (4 << 8) | HDLCD_BURST_8);
+ MmioWrite32(HDLCD_REG_POLARITIES, HDLCD_PXCLK_LOW | HDLCD_DATA_HIGH | HDLCD_DATEN_HIGH | HDLCD_HSYNC_LOW | HDLCD_VSYNC_HIGH);
+ MmioWrite32(HDLCD_REG_PIXEL_FORMAT, HDLCD_LITTLE_ENDIAN | HDLCD_4BYTES_PER_PIXEL);
+ MmioWrite32(HDLCD_REG_RED_SELECT, (0 << 16 | 8 << 8 | 0));
+ MmioWrite32(HDLCD_REG_GREEN_SELECT, (0 << 16 | 8 << 8 | 8));
+ MmioWrite32(HDLCD_REG_BLUE_SELECT, (0 << 16 | 8 << 8 | 16));
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+LcdSetMode (
+ IN UINT32 ModeNumber
+ )
+{
+ EFI_STATUS Status;
+ UINT32 HRes;
+ UINT32 HSync;
+ UINT32 HBackPorch;
+ UINT32 HFrontPorch;
+ UINT32 VRes;
+ UINT32 VSync;
+ UINT32 VBackPorch;
+ UINT32 VFrontPorch;
+ UINT32 BytesPerPixel;
+ LCD_BPP LcdBpp;
+
+
+ // Set the video mode timings and other relevant information
+ Status = LcdPlatformGetTimings (ModeNumber,
+ &HRes,&HSync,&HBackPorch,&HFrontPorch,
+ &VRes,&VSync,&VBackPorch,&VFrontPorch);
+ ASSERT_EFI_ERROR (Status);
+ if (EFI_ERROR( Status )) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ Status = LcdPlatformGetBpp (ModeNumber,&LcdBpp);
+ ASSERT_EFI_ERROR (Status);
+ if (EFI_ERROR( Status )) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ BytesPerPixel = GetBytesPerPixel(LcdBpp);
+
+ // Disable the controller
+ MmioWrite32(HDLCD_REG_COMMAND, HDLCD_DISABLE);
+
+ // Update the frame buffer information with the new settings
+ MmioWrite32(HDLCD_REG_FB_LINE_LENGTH, HRes * BytesPerPixel);
+ MmioWrite32(HDLCD_REG_FB_LINE_PITCH, HRes * BytesPerPixel);
+ MmioWrite32(HDLCD_REG_FB_LINE_COUNT, VRes - 1);
+
+ // Set the vertical timing information
+ MmioWrite32(HDLCD_REG_V_SYNC, VSync);
+ MmioWrite32(HDLCD_REG_V_BACK_PORCH, VBackPorch);
+ MmioWrite32(HDLCD_REG_V_DATA, VRes - 1);
+ MmioWrite32(HDLCD_REG_V_FRONT_PORCH, VFrontPorch);
+
+ // Set the horizontal timing information
+ MmioWrite32(HDLCD_REG_H_SYNC, HSync);
+ MmioWrite32(HDLCD_REG_H_BACK_PORCH, HBackPorch);
+ MmioWrite32(HDLCD_REG_H_DATA, HRes - 1);
+ MmioWrite32(HDLCD_REG_H_FRONT_PORCH, HFrontPorch);
+
+ // Enable the controller
+ MmioWrite32(HDLCD_REG_COMMAND, HDLCD_ENABLE);
+
+ return EFI_SUCCESS;
+}
+
+VOID
+LcdShutdown (
+ VOID
+ )
+{
+ // Nothing to do in terms of hardware.
+ // We could switch off the monitor display if required
+}
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