projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | SPDX-License-Identifier: GPL-2.0+ |
| 50217dee JS |
2 | /* |
| 3 | * (C) Copyright 2008-2009 | |
| 4 | * BuS Elektronik GmbH & Co. KG <www.bus-elektronik.de> | |
| 5 | * Jens Scharsig <[email protected]> | |
| 50217dee JS |
6 | */ |
| 7 | ||
| 8 | U-Boot vcxk video controller driver | |
| 9 | ====================================== | |
| 10 | ||
| 11 | By defining CONFIG_VIDEO_VCXK this driver can be used with VC2K, VC4K and | |
| 12 | VC8K devices on following boards: | |
| 13 | ||
| 14 | board | ARCH | Vendor | |
| 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 | |
| 20 | ||
| 21 | Driver configuration | |
| 22 | -------------------- | |
| 23 | ||
| 24 | The driver needs some defines to describe the target hardware: | |
| 25 | ||
| 26 | CONFIG_SYS_VCXK_BASE | |
| 27 | ||
| 28 | base address of VCxK hardware memory | |
| 29 | ||
| 30 | CONFIG_SYS_VCXK_DEFAULT_LINEALIGN | |
| 31 | ||
| 32 | defines the physical alignment of a pixel row | |
| 33 | ||
| 34 | CONFIG_SYS_VCXK_DOUBLEBUFFERED | |
| 35 | ||
| 36 | some boards that use vcxk prevent read from framebuffer memory. | |
| 37 | define this option to enable double buffering (needs 16KiB RAM) | |
| 38 | ||
| 39 | CONFIG_SYS_VCXK_<xxxx>_PIN | |
| 40 | ||
| 41 | defines the number of the I/O line PIN in the port | |
| 42 | valid values for <xxxx> are: | |
| 43 | ||
| 44 | ACKNOWLEDGE | |
| 45 | describes the acknowledge line from vcxk hardware | |
| 46 | ||
| 47 | ENABLE | |
| 48 | describes the enable line to vcxk hardware | |
| 49 | ||
| 50 | INVERT | |
| 51 | describes the invert line to vcxk hardware | |
| 52 | ||
| 53 | RESET | |
| 54 | describes the reset line to vcxk hardware | |
| 55 | ||
| 56 | REQUEST | |
| 57 | describes the request line to vcxk hardware | |
| 58 | ||
| 59 | CONFIG_SYS_VCXK_<xxxx>_PORT | |
| 60 | ||
| 61 | defines the I/O port which is connected with the line | |
| 62 | for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN | |
| 63 | ||
| 64 | CONFIG_SYS_VCXK_<xxxx>_DDR | |
| 65 | ||
| 66 | defines the register which configures the direction | |
| 67 | for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN |