diff options
| author |   Yang Zhang <yang.z.zhang@intel.com> | 2015-08-28 09:58:54 +0800 |
|---|---|---|
| committer | Yang Zhang <yang.z.zhang@intel.com> | 2015-09-01 12:44:00 +0800 |
| commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
| tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/u-boot/doc/README.bus_vcxk | |
| parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) | |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/u-boot/doc/README.bus_vcxk')
| -rw-r--r-- | qemu/roms/u-boot/doc/README.bus_vcxk | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/doc/README.bus_vcxk b/qemu/roms/u-boot/doc/README.bus_vcxk new file mode 100644 index 000000000..5bd3c652a --- /dev/null +++ b/qemu/roms/u-boot/doc/README.bus_vcxk @@ -0,0 +1,68 @@ +/* + * (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 |