1 SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2008-2009
4 * BuS Elektronik GmbH & Co. KG <www.bus-elektronik.de>
5 * Jens Scharsig <esw@bus-elektronik.de>
8 U-Boot vcxk video controller driver
9 ======================================
11 By defining CONFIG_VIDEO_VCXK this driver can be used with VC2K, VC4K and
12 VC8K devices on following boards:
15 -----------------------------------------------------------------------
16 EB+CPU5282-T1 | MCF5282 | BuS Elektronik GmbH & Co. KG
17 EB+MCF-EVB123 | MCF5282 | BuS Elektronik GmbH & Co. KG
18 EB+CPUx9K2 | AT91RM9200 | BuS Elektronik GmbH & Co. KG
19 ZLSA | AT91RM9200 | Ruf Telematik AG
24 The driver needs some defines to describe the target hardware:
28 base address of VCxK hardware memory
30 CONFIG_SYS_VCXK_DEFAULT_LINEALIGN
32 defines the physical alignment of a pixel row
34 CONFIG_SYS_VCXK_DOUBLEBUFFERED
36 some boards that use vcxk prevent read from framebuffer memory.
37 define this option to enable double buffering (needs 16KiB RAM)
39 CONFIG_SYS_VCXK_<xxxx>_PIN
41 defines the number of the I/O line PIN in the port
42 valid values for <xxxx> are:
45 describes the acknowledge line from vcxk hardware
48 describes the enable line to vcxk hardware
51 describes the invert line to vcxk hardware
54 describes the reset line to vcxk hardware
57 describes the request line to vcxk hardware
59 CONFIG_SYS_VCXK_<xxxx>_PORT
61 defines the I/O port which is connected with the line
62 for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN
64 CONFIG_SYS_VCXK_<xxxx>_DDR
66 defines the register which configures the direction
67 for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN