/*
|
* (C) Copyright 2008-2009
|
* BuS Elektronik GmbH & Co. KG <www.bus-elektronik.de>
|
* Jens Scharsig <esw@bus-elektronik.de>
|
*
|
* SPDX-License-Identifier: GPL-2.0+
|
*/
|
|
U-Boot vcxk video controller driver
|
======================================
|
|
By defining CONFIG_VIDEO_VCXK this driver can be used with VC2K, VC4K and
|
VC8K devices on following boards:
|
|
board | ARCH | Vendor
|
-----------------------------------------------------------------------
|
EB+CPU5282-T1 | MCF5282 | BuS Elektronik GmbH & Co. KG
|
EB+MCF-EVB123 | MCF5282 | BuS Elektronik GmbH & Co. KG
|
EB+CPUx9K2 | AT91RM9200 | BuS Elektronik GmbH & Co. KG
|
ZLSA | AT91RM9200 | Ruf Telematik AG
|
|
Driver configuration
|
--------------------
|
|
The driver needs some defines to describe the target hardware:
|
|
CONFIG_SYS_VCXK_BASE
|
|
base address of VCxK hardware memory
|
|
CONFIG_SYS_VCXK_DEFAULT_LINEALIGN
|
|
defines the physical alignment of a pixel row
|
|
CONFIG_SYS_VCXK_DOUBLEBUFFERED
|
|
some boards that use vcxk prevent read from framebuffer memory.
|
define this option to enable double buffering (needs 16KiB RAM)
|
|
CONFIG_SYS_VCXK_<xxxx>_PIN
|
|
defines the number of the I/O line PIN in the port
|
valid values for <xxxx> are:
|
|
ACKNOWLEDGE
|
describes the acknowledge line from vcxk hardware
|
|
ENABLE
|
describes the enable line to vcxk hardware
|
|
INVERT
|
describes the invert line to vcxk hardware
|
|
RESET
|
describes the reset line to vcxk hardware
|
|
REQUEST
|
describes the request line to vcxk hardware
|
|
CONFIG_SYS_VCXK_<xxxx>_PORT
|
|
defines the I/O port which is connected with the line
|
for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN
|
|
CONFIG_SYS_VCXK_<xxxx>_DDR
|
|
defines the register which configures the direction
|
for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN
|
